JPH03179408A - Camera with automatic zooming function - Google Patents

Abstract

PURPOSE:To reduce failure in photography as to an automatic zooming mechanism by determining the focal length of a photographic lens automatically with a photographic magnification select signal from a remote device as to a subject and subject distance information and driving the photographic lens to the focal length. CONSTITUTION:A focal length determining means 52 determines the focal length of the photographic lens 12 automatically with the specific signal from the remote operation means 56 which indicates the photographic magnification of the subject and the subject distance information from a range finding means 53. Then a lens driving means 51 drives the photographic lens 12 so as to obtain the focal length. Namely, desired photographic magnification is selected through remote operation and the magnification of automatic zooming is determined automatically according to the selected photographic magnification and subject distance information. Therefore, the photographic magnification of the subject can be set remotely without depending upon only the judgement of a camera main body. Consequently, the camera which reduces failure in photography by automatic zooming is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera having an automatic photographing magnification adjustment (hereinafter abbreviated as "auto zoom") mechanism, and particularly relates to a camera having an auto zoom mechanism having a remote control device.

[Prior Art] Conventionally, a camera with a remote control device (hereinafter abbreviated as a remote control) has been proposed. A camera with a remote control is very convenient because it allows the photographer to decide the timing of the release by himself or herself. Apart from this, cameras with an auto zoom function have also been proposed. Cameras with an auto zoom function are very convenient because the camera automatically determines the appropriate magnification without the photographer having to perform any zoom operations.

The auto zoom mechanism is a function that automatically adjusts the focal length f of the photographic lens to f-β×D in order to obtain the set photographic magnification β for a given subject distance HD. say. For example, when a photo is taken in horizontal position, the magnification ratio is generally 1/120 for a full-body photo.
If it is an upper body photo, it will be selected as β-1/70.
If it is a face photograph, β-1730 is selected.

[Problem to be Solved by the Invention] When using a camera with an auto zoom function using a remote control, if the magnification remains set to β-1/30 for photographing a face, for example, the photographer When remote-controlled photography is carried out by a photographer and two other people, a total of three people, the auto zoom mechanism may be activated, resulting in only one photographer appearing large and the other two being omitted. There are also some cameras that allow you to change the magnification on the camera side, but the operation is cumbersome and the display of the magnification is difficult to understand.

The present invention has been made to solve the above-mentioned problems, and its primary purpose is to provide a camera having an auto-zoom mechanism that reduces failures in photographing due to the auto-zoom mechanism.

[Means for Solving the Problems] A camera having an auto-zoom mechanism according to the present invention has a configuration as shown in FIG. 1 in order to achieve the above object. That is, the camera having an auto zoom mechanism according to the present invention includes a distance measuring means 53 for measuring the distance to the subject, a photographic lens 12 that can change the focal length, and a camera for selecting the photographing magnification when photographing the subject. a remote control means 56 comprising a photographing magnification selection means 54 and a transmitting means 55 that outputs a predetermined signal in response to the operation of the photographing magnification selection means 54;
a focal length determining means 52 that determines the focal length of the photographic lens 12 based on a predetermined signal and object distance information obtained from the distance measuring means 53; and lens driving means 51 for driving the lens.

However, FIG. 1 is a block diagram showing the configuration of the present invention in functional blocks, and in the embodiments described later, the main part of the above configuration is realized by a microcomputer program.

[Effect] The operation of this invention will be explained below with reference to FIG.

The focal length of the photographic lens 12 is automatically determined by the focal length determining means 52 based on a predetermined signal representing the photographing magnification of the object from the remote control means 56 and the object distance information from the distance measuring means 53. Then, the photographing lens 12 is driven by the lens driving means 51 so that the focal length is achieved. Therefore, the desired photographing magnification is selected by remote control, and the auto zoom magnification is automatically determined from this and the subject distance information.

[Embodiments of the invention]

FIG. 2A is a perspective view of a camera having a remote photographing function and an auto-zoom mechanism according to the present invention.

Referring to FIG. 2A, a camera having a remote photographing function and an auto zoom mechanism according to the present invention is provided on the front side of the camera body, and has a main switch operation lever 10 for enabling zoom operation, and a main switch operation lever 10 on the front side of the camera body. A release button 11 is provided at the top for metering and exposure, a photographic lens 12 is provided at the front of the camera body for photographing a subject, and a release button 12 is provided at the top of the camera body for setting an auto zoom mode. Auto zoom mode button 1 for
3, a zoom operation lever 14 provided on the top of the camera body and serving as a seesaw type switch for switching the focal length of the photographic lens 12 between the telephoto direction and the wide direction; It covers a display LCD 15 composed of a liquid crystal for displaying shutter speed, etc., a shooting mode button 16 for shooting in self mode or remote control mode, a light receiving window 32 for receiving remote control signals, and a lens 12. and a lens cap 30.

The release button 11 is a two-stage push type, and one
The photometry switch S is turned on by pressing it in one step (half-way).
Photometry is started, and the release switch S2 is turned on by pressing down two steps (fully pressed down), and exposure is performed.

The zoom operation lever 14 includes a zoom in switch S4 for moving the photographing lens 12 in the telephoto direction (direction in which the focal length becomes larger) and a zoom switch S4 for moving the photographing lens 12 in the wide direction (direction in which the focal length becomes smaller). and an out switch S5. Note that the focal length of the photographic lens 12 is 38 to 90 mm.

The lens cap 30 can be attached to the camera body to protect the camera lens. This lens cap 30 has a built-in transmitting circuit for remote photographing. Further, on the back side (lens side) of the lens cap 30, as shown in FIG. 2B, operation switches S13 to S+6 for remote photography are provided. The means 33 are adapted to emit light and send a signal to the camera.

On the lens cap 30, adjacent to each operation switch SI3 to SI517, there are a one-person shooting mark 30a, a two-person shooting mark 30b, and a thirteen-person shooting mark 3, as shown in FIG.
0C1 multi-person shooting mark 30d, release button mark 30e1, arrow mark 30 indicating the light projection direction of the light projection means 33
f is written.

Note that instead of the photographic marks 30a to 30d, a photographing magnification β suitable for each purpose may be directly written.

FIG. 3 is a perspective view of the lens barrel section 20 for holding the photographic lens 12. Referring to FIG. 3, the lens barrel section 20 includes a lens barrel 21 for holding a photographic lens at one end thereof, and a lens barrel 21 for holding a photographing lens at one end thereof.
a zooming motor M provided near the lens side end of the lens barrel 21 for moving the photographing lens 12 in the telephoto direction or the wide direction by rotating the lens barrel 21;
A zoom encoder 22 for detecting the zoom position by rotation of , and an output signal S from the zoom encoder 22
S S +. Encoder brush 26 for taking out
and a holding member 2 for holding the lens barrel 21 on the camera body.
3. A lens barrel rotation gear 24 for transmitting the driving force of the zooming motor M to the lens barrel 21 is provided on the photographing lens 12 side of the lens barrel 21 . By operating the zoom operating lever 14 shown in FIG. 2A, the zooming motor M is driven, and its driving force is transmitted to the a-21 via the lens barrel rotation gear 24, changing the focal length of the photographic lens 12. . The focal length at the lens stop position is detected by the zoom encoder 22, and the focal length at that time is transmitted via the encoder brush 26 as an encoder signal to a control CPU (described later) provided within the camera body.

The details will be described later.

FIG. 4 is a diagram showing the relationship between the output signal of the zoom encoder 22 explained in FIG. 3 and the focal length of the photographing lens 12 at that time. Referring to FIG. 4, zoom encoder 22 is a Gray code type encoder and has an encoder pattern as shown in the center of the figure. The zoom encoder has 21 zoom positions represented by 1 to 21, and the representative focal length value for each zoom position is the representative f.
Shown as a value. For example, when the zoom position is 1, the representative f value is 90 mm, and at this time the photographing lens 12
is at the tele end. On the other hand, the typical f-number at one zoom position is 38 mm, and at this time the photographing lens 12 is at the wide end. The zoom position ff120°21 is when the photographing lens 12 is in the retracted state. The encoder pattern is as shown in the center of the figure, and output signals 86 to S+0 as shown in the figure are output from the encoder brush 26 as encoder signals. The signal contents in which on and off of the encoder pattern are represented by H and L, respectively, are shown in the function column. A hexadecimal code is a hexadecimal representation of the contents of a function. That is, when the zoom position is determined, the representative f value is determined accordingly, and the output data at that time is output as a 5-bit hexadecimal code.

FIG. 5 is an overall block diagram showing an electric circuit of a camera having a remote photographing function (hereinafter abbreviated as remote photographing function) and an auto zoom mode according to the present invention. Referring to FIG. 5, an electric circuit of a camera having a remote control photographing function and an auto zoom mode according to the present invention includes a main switch SO
output signals S, ~S+0 expressed in 5 bits from the switches provided on the camera body, the zoom encoder shown in Fig. 3, and the film sensitivity reading terminal D, which will be explained later.
A control CPU which inputs the output signals of Control CPU1
A flash block 5 outputs monitor signals RDY1 and RDY2 of the light emitting state in response to a flash boost start signal FC from a flash block 5, and is connected to a control CPUI and controls a zooming motor M+, winding/rewinding in response to the output signal. A motor driver section 4 that controls the operation of the motor M2, a display section 6 that displays a predetermined display on the display LCD 15 in response to output signals LED and LCD from the control CPU, and a display section 6 that receives remote control signals and sends received signals to the control CPU. and a remote control transmitter 8 which generates different remote control signals (details will be described later) depending on the human power of the remote control operation switches S+3 to SIG. The photometry/distance measurement circuit unit 2 receives the data transmission destination designation signal C5I from the control CPUI and the photometry/distance measurement circuit ON signal AFES for turning on the photometry/distance measurement circuit, and sends the photometry/distance measurement circuit data to the control CPUI. Outputs read signal AFED. The shutter block 3 receives a data destination designation signal C52, focus data, a shutter control data output signal 5HTD, and a focusing start command signal STR from the control CPUI. The motor driver section 4 includes a zooming motor driver section 4a that controls the zooming motor M, and a winding/rewinding motor driver section 4b that controls the winding/rewinding motor M2. receives the zooming motor M and drive signals ZCW and ZCCW from the control CPUI, and the winding/rewinding motor driver section 4b receives film winding motor control signals wcw and wccw signals from the control CPUI. The display section 6 receives a display signal LED from a light emitting diode and a liquid crystal display signal LCD, and displays the respective display contents.

When the remote control receiving circuit 7 receives a remote control signal from the outside, it outputs a received signal RMC to the control CPUI. The received signal RMC is normally "L", but it becomes "H" when a signal is received.

Control signals zcw and zccw for the zoom motor M.

Table 1 shows the values of and the state of the motor at that time.

Also, a control signal WCW for the winding/rewinding motor M2.

Table 2 shows wccw and the motor status at that time.

FIG. 6 is a diagram showing the display contents of the display LCD shown in FIG. 2A. When the camera is in normal mode, a display as shown in Figure 6(a) is made, and when the camera is in auto zoom mode, a display as shown in Figure 6(b) is made.
When in the remote control mode, a display as shown in FIG. 6(c) is made, and when in the self mode, a display as shown in FIG. 6(d) is made. The entire display segment necessary for performing such a display is shown in FIG. 6(e).

Referring to FIG. 6(e), the display LCD includes an auto zoom mode display segment 151, a film presence/absence confirmation display segment 152, a film counter 153, a film loading confirmation display segment 154, and a self mode display segment 155. and a remote control mode display segment 156.

The camera capable of remote photography and automatic zoom according to the present invention has a normal mode, an auto zoom mode, a self mode, a remote control mode, and an auto zoom-time release mode, as shown in FIG. FIG. 7 shows the relationship between such transitions of each mode. Here, the normal mode is a mode in which self-photography and remote photography are not performed, and is not an auto-zoom mode but an initial mode when the camera is activated. Selfie mode is a mode for taking self-photographs, a mode for taking group photos, etc. After pressing the release button 11,
This is a mode in which exposure is performed after a certain period of time has elapsed. Auto zoom mode (hereinafter abbreviated as AZ mode) is a mode that automatically adjusts the focal length f of the photographing lens so that a photograph with the photographic magnification set for the distance [D] to a given subject is obtained. . The AZ-time release mode is a mode that temporarily releases the AZ mode. The remote control mode is a mode for remote photographing using a remote control.

The transition between the above five modes will be explained with reference to FIG. To change from normal mode to AZ mode when the camera is activated, the auto zoom mode button 13 shown in FIG. 2A can be pressed. The same applies when returning from AZ mode to normal mode. That is, the normal mode and the AZ mode are repeated each time the auto zoom mode button 13 is pressed once. When changing from normal mode to self mode, the user only has to press the photographing mode button 16 shown in FIG. 2A. To switch to remote control mode, press the shooting mode button]6 in self mode. Pressing the shooting mode button ] 6 in remote control mode returns to normal mode. In other words, each press of the shooting mode button 16 switches to normal mode →
Switches from self mode to remote control mode to normal mode. In addition, when in selfie mode, the camera automatically returns to normal mode after the selfie shot is finished.

To switch from the AZ mode to the AZ-time release mode, the zoom operation lever 14 shown in FIG. 2A can be operated to press the zoom-in switch S4 or the zoom-out switch S. Conversely, from AZ-time error mode to A
To return to the Z mode, the auto zoom mode switch S may be turned on by pressing the auto zoom mode button 13 shown in FIG. 2A, or single frame photography may be terminated. When switching from the AZ-time release mode to the selfie mode, the selfie switch S+2 may be turned on by pressing the photographing mode button 16. To switch between AZ mode and self mode, press auto zoom mode switch S or self switch S+2, respectively.
Just turn on.

To switch from remote control mode to AZ mode, it is sufficient to turn on the auto zoom mode switch S.

FIG. 8 is a flowchart of a main routine showing the operation of the camera shown in FIG. The camera having a remote photographing function and an auto zoom mode according to this embodiment starts its operation by inserting a battery into the camera body and resetting it. Referring to FIG. 8, when the camera is reset, an initialization subroutine (#2) is entered for initializing various parameters, flags, memory, etc. for operating the camera. Next, the main routine (#4) is entered, and it is determined whether or not the main switch S0 has changed (#6). Here the main switch So
When it is determined that the main switch has changed, the main switch check routine (#20) is executed to check the main switch.
). If it is determined in #6 that the main switch So has not changed, the main switch So
It is determined whether or not is on (#8). Main switch S
If o is off, the process moves to the main routine (#4). If it is determined that the main switch So is on, it is determined whether the photometry switch S is on or not (#
10). If it is determined that the switch is on, the processing flow moves to a photometry switch-on routine (#22).

δp1 optical switch S.

If not on, it is determined whether the auto zoom mode switch S is on (#12). If it is determined that the switch is on, the processing flow moves to the zoom mode switch-on routine (#24). When it is determined that the auto zoom mode switch S3 is off, it is determined whether or not the shooting mode switch S+2 is on (#14).
If F+1 is turned off if it is on, the processing flow moves to the photographing mode switch on routine (#26), and if it is judged to be off, it is judged whether the zoom-in switch S4 is on or not. If the zoom-in switch S is not on, it is determined whether the zoom-out switch S is on. If the zoom-in switch S4 is on or the zoom-out switch S5 is on, the processing flow moves to a zoom switch-on routine (#28). Step #
If the zoom out switch S is off at step #18, it is determined whether the remote control mode is set or not at step #19.

If it is not the remote control mode, the program moves to the main routine (#4). In remote control mode, signal R
The state of the MC is determined. If the signal RMC is "H" upon reception of the remote control signal, the program moves to the remote control determination routine of #23.If it is "L", the processing flow moves to the main routine (#4).

FIG. 9 is a flowchart showing the contents of the main switch SO check routine shown at step #20 in the main routine of FIG. Referring to FIG. 9, in the processing flow, when the main switch So check routine is entered, the main switch S is first checked.

It is determined whether the change was from off to on (#
30). If the change is from off to on, the driving direction of the photographic lens 12 is set to the telephoto direction (#3
2). Next, the stopping position of the photographic lens 12 is at the wide end (fourth
It is set to the 19th position (it) at the zoom position shown in the figure. On the other hand, when it is determined in step #30 that the change in the main switch So is from on to off, the photographic lens 12
Since it is necessary to retract the lens, the drive direction is set to the wide direction (#38), and the stop position of the photographic lens is set to the retracted position (zoom position 21 shown in FIG. 4) (#38). 40). After the stop position is set in step 34 or step 40, the processing flow moves to a zooming subroutine (#36), and then moves to the main routine (#4).

Note that the drive direction set in steps #32 and #38 is specifically stored as data of 1 or 0 on the RAM of the controller 1lcPU1.

That is, 1 is set when the drive direction is the telephoto direction, and 0 is set when the drive direction is the wide direction.

Next, the collapsing operation of the photographic lens 12 will be explained. Collapsing the photographic lens 12 refers to storing the lens barrel 21 within the camera body when the photographic lens 12 is not used. When the photographic lens 12 is in the retracted zoom position shown in FIG. 4, the photographic lens 12 is covered with a barrier 25 as shown in FIG. In addition, photographing lens 1
When the zoom position 2 is in the middle of collapsing, indicated by 20, the barrier 25 is half-open, making it impossible to take a photograph.

Next, remote control signal discrimination will be explained with reference to FIGS. 10A to 11. First, the remote control signal waveform will be explained with reference to FIG. 10A. This figure shows a received signal RMC when a remote control signal is received.

First, the signal becomes "H" for 10 m5 (remote control start signal). The time of 10 m5 is sufficiently longer than the time required to determine each switch in the main routine described above. This signal causes the control CPU to:
Shift the program to the remote control identification routine. Next 1
“L” for ms.

After that, 3-bit remote control mode data is sent to "H" or "L" every 1 ms. The remote control mode data and its contents are shown in FIG. 10B. For example, when the remote control mode data is 000, the camera does not perform auto zoom but only releases the camera. Also, when the remote control mode data is 001.010, 011.100, the camera is released after performing auto zoom, but depending on the data, the size of the subject is set to the photographer's desired size ( (described later), then release the camera. These signals correspond one-to-one to the aforementioned operation switches S+3 to S17 on the lens cap, and can be arbitrarily selected by the photographer.

Next, a flowchart of the remote control determination routine will be described with reference to FIG. First, in #501, it waits for the reception signal RMC to become "L".

After the 10m5 remote control start signal is output, “L”
o, the program advances to #503 and from there the control CPUI waits 1.5ms. Then, the received signal RMC is manually input and stored in memory (#505, #507). Next signal 3
Determine whether or not the bit has been received.If 3 bits have not been received yet, wait 1ms at #511, and the program returns to #5.
Proceed to o5 and repeat the above operations. When 3 bits are received, the program proceeds from #509 to #513, and the mode is determined as explained in FIG. 108.

Next, determine the necessity of auto zoom (#515) and set/reset the auto zoom flag FAZ (
#517, #519). Here auto zoom flag FA
Z is a flag for performing auto zoom even in remote control mode, and becomes 1 when auto zoom is necessary. Then, set the remote control flag FRMC to 1 (#521)
, the process moves to the S,ON routine, which will be described later. Here, the remote control flag FRMC is a flag for storing whether or not the release is performed by the remote control, and is set to 1 when the release is performed by the remote control.

In this embodiment, the desired photographing magnification can be selected using the remote control, but auto zoom may not be performed during remote control photographing.

By doing so, the remote control signal is simplified and the structure of the remote control transmitter becomes simple.

Next, the processing flow when the photometry switch S1 is pressed or when the release is performed by the remote control will be described with reference to FIG. When the photometry switch S is turned on by pressing the release button 11 one step,
Alternatively, when a release signal from the remote controller is received, the processing flow moves to a photometry/distance measurement subroutine (#50), and then it is determined whether or not the AZ mode is set (#52). A
When it is determined that the mode is Z mode, the AZ calculation subroutine (#54), AE calculation (#56), flash boost subroutine (#58), and zooming subroutine (#54) are executed.
60) are executed.

However, the AE calculation (#56) is performed using the AZ calculation subroutine (#56).
This is performed based on the zoom position obtained from the calculation result of step 54). If it is determined in step #52 that the mode is not AZ mode, it is determined in #53 whether FAZ is 1 or 0. FAZ-
If it is 1, the program advances to #54 and performs the above-mentioned operation. When FAZ-○, AE calculation (#62) is performed without performing AZ calculation, and flash boosting (#62) is performed.
64) is performed. After the zooming subroutine (#60) in AZ mode or the flash boost (#64) when not in AZ mode, it is determined in #65 whether or not the release was performed using the remote control, and if the release was not performed using the remote control, the metering switch is still on. It is determined whether or not S is turned on (#66). If the photometry switch S1 is on, it is determined whether or not the release switch S2 is on, and if the release switch S2 is off, flash boosting (#70) is performed again. The processing flow moves to step #66. If the release button S2 is on in step #68, or if it is determined in step #65 that the release is by remote control, step #6
In step 9, it is determined whether the mode is self mode or not. If the mode is the cell mode, the process waits for 10 seconds (#71), and if the mode is not the self mode, the process immediately proceeds to the next step. And a prism (#72) that performs minute zooming to ensure resolution (described later)
is performed, and the focus/exposure subroutine (#74
), and after one frame winding (#76), it is determined whether or not the AZ-time release mode is set (17g).

If it is AZ-time release mode, the shooting mode changes from AZ-time release mode to AZ mode (#80), the mode at that time is displayed on display LCD 5, and after setting the remote control flag FRMC to O (#83 ), the program moves to the main routine. If the photometry switch S is off in step #66, or if the AZ-time release mode is not in step #78, the program proceeds to the main routine after similarly setting the flag FRMC to 0.

Nao, the method of displaying the mode on the display LCD 15 is as follows.
If in AZ mode, auto zoom mode display (Fig. 6)
d)) The segment indicated by 151 is lit and AZ-
If it is in time release mode, auto zoom mode display 151
will be benefited by the frequency of 2H2.

Note that this AZ-time release mode is used in the following cases. For example, when the AZ mode is selected, the size of the subject (imaging magnification) is determined by the camera. However, you may not like this size. In such a case, by operating the zoom operating lever 14 to set the AZ-time release mode, the size of the subject can be changed by operating the same lever in the same way as a normal zooming samurai.

FIG. 13 shows a subroutine when the auto zoom mode display/notch S is turned on. Referring to Figure 13,
When the auto zoom mode switch S is turned on, the AZ
It is determined whether the mode is set or not (#QO). If it is determined that the mode is AZ mode, the shooting mode is switched from AZ mode to normal mode (#Q2). When it is determined that the AZ mode is not in step #90, if it is in the normal mode or the AZ-time release mode,
The shooting mode is set to AZ mode (#94), and it is determined whether the zoom lens is equipped with a teleconverter (
#98) If it is determined that the teleconverter is included, the processing flow moves to step #92. If the teleconverter is not included, the self mode is canceled regardless of whether it is in the self mode or not (#100). Remote control mode is also canceled. The processing flow then moves to mode display in #96, and the photographing mode at that time is displayed as shown in FIG.

Note that the determination in step 98 as to whether or not the teleconverter is attached is made using the teleconverter switch S, which is switched by the teleconverter disposed near the photographic lens 12.
This is determined by the on/off status of l+. Note that step 98
The reason why the AZ mode can be switched to the normal mode when a teleconverter is installed is as follows. In cameras that do not have interchangeable lenses, to which this invention is applied, a front converter is generally used, which is large and heavy. Therefore, when zooming is performed under such conditions, the load on the zoom motor M becomes large and the zoom speed becomes slow. Therefore, it takes a long time for automatic zooming, and the time lag when pressing the release button becomes large, making it impossible to take a photograph with good timing.

Next, referring to Fig. 14, shoot mode SW/Sochi S1□
The subroutine when is on is explained below. If the shooting mode switch S+2 is on, it is first determined whether or not the camera is in self-mode (#110), and if it is self-mode, the mode is changed from self-mode to remote control mode (#112), and if it is not self-mode, , it is determined whether or not the remote control mode is set (#113). If it is not in remote control mode, that is, in normal mode, self mode is set (#114), the shooting mode is changed from AZ mode or AZ-n,'j release mode to normal mode (tl16), and the program is changed to #
118. When in remote control mode, the remote control mode is changed to normal mode (#115),
The program moves to #118. The photographing mode in this state is then displayed on the display LCD as shown in FIG. 6 (#118). After that, the processing flow moves to the main routine. Therefore, the self mode, remote control mode, and AZ mode or AZ-time release mode are not set redundantly. However, it is possible to perform auto zoom in remote control mode.

FIG. 15 shows that the zoom operation lever 14 shown in FIG. 2A is operated, and the zoom-in switch S4 or the zoom-out switch S! Shows the subroutine when one of the is turned on. When either the zoom in switch S or the zoom out switch S is turned on, the shooting mode changes to A.
It is determined whether or not it is the Z mode (#120), and if it is the AZ mode, the photographing mode is switched from the AZ mode to the AZ-time release mode (#122), and the mode is displayed (#124). After it is determined in step #120 that the mode is not AZ mode, or after the mode is displayed in step #124, it is determined whether the zoom-in switch S4 is on. If the zoom-in switch S is on, the driving direction of the photographic lens 12 is set to the telephoto direction (#134), and the stop position of the photographic lens 12 is set to the telephoto end (#136). If the zoom-in switch S4 is off, it is determined whether the zoom-out switch S5 is on or not, and if the zoom-out switch S5 is on, it is an instruction to zoom out, so the taking lens 12
The driving direction is set to the wide direction (9130), and the stop position of the photographic lens 12 is set to the wide end (3
132). After the stop position of the photographic lens 12 is set to one of the above positions, the processing flow moves to a zooming subroutine (8138). If the zoom out switch S5 is turned off in step #128 or after zooming is completed in step #]38, the processing flow returns to the main routine.

Note that if both the zoom-in switch S4 and the zoom-out switch Ss are off in steps #126 and #128, this is a case where an erroneous signal such as noise has been manually input. Further, the setting of the stop position of the photographing lens 12 is as shown in #34 and #40 in FIG.
The zoom position data is stored on the RAM of the control CPU as shown in FIG.

Next, the zooming subroutine will be explained with reference to FIG. When the zooming subroutine is called, the zoom position is first read (#140), and it is determined whether the photographing lens 12 has reached the telephoto end, wide end, or AZ stop position (#140). 14
2). When it is determined that the camera is not in the stop position, it will move to ZCW if it is in the telephoto direction depending on the driving direction of the photographic lens at that time.
A signal is output (#146), the zoom motor M1 is rotated in the forward direction, and if the driving direction is the wide direction, a ZCCW signal is output (#148), the zoom motor M is rotated in the reverse direction, and the zoom motor M1 is rotated in the reverse direction.
It is determined whether the mode is Z mode or Sakazuki (#150). Step #
When it is determined that the AZ mode is in step 150, it is determined whether the release switch S2 is on or not (#] 52), and if the release switch S2 is off, it is determined whether the photometry switch S1 is on or not. (#154). If the photometry switch S is on in step #154, the zoom position is read (#154), and it is determined whether the photographic lens 12 has reached the stop position (#158). Step #
If it is determined in step 150 that the mode is not AZ mode, it is determined whether the zoom-in switch S4 or the zoom-out switch S5 is on (#160), and if it is determined that the zoom-in switch S4 or zoom-out switch S5 is on, the processing flow proceeds to the zoom position reading subroutine (#160). 1
56). If it is determined in step #158 that it is not at the stop position, the main switch S is pressed.

It is determined whether it is on or fortune-telling, and when it is determined that it is on, the processing flow returns to step #150.

When it is determined in step #160 that the zoom switches S4 and S5 are not on, or when it is determined that the main switch So is off in step #162 (#162
) applies a brake to the zoom motor M1, so the processing flow moves to step #164. Step #152
When it is determined that the release switch S2 is on, the brake is applied to the zoom motor M1 (#172).
, wait for 0.1 seconds (#174), and stop outputting the brake signal to the zoom motor M1 (#176).
, AE calculation is performed (#178). In this case, although the mode is AZ mode, the photographing lens 12 has not been moved to the original target position for photographing the subject, so the AE calculation is performed again at the zooming stop position. The reason why the AE calculation is performed again in this way is that the open F value of the photographing lens 12 differs depending on the zoom position.

If it is determined in step #154 that the photometry switch S1 is not on, the processing flow moves to step #164 in order to brake the zoom motor M1. That is, steps #150, #152, #154 and #1
Referring to 64, when the photometry switch SI is turned off even during zooming in the AZ mode, the brake is immediately applied to the zoom motor M, and the start and stop of auto zoom is controlled by the user. Therefore, it is possible to provide an auto-zoom camera that allows the user to take pictures without causing any discomfort in the camera operation without causing a timing shift between manual camera operations during photography.

In order to apply the brake to the zoom motor M in step #164, the zcwSzccw signal is output, as shown in Table 1, by setting both output signals to L, the motor is braked. It's for a reason.

When the brake is applied to the zoom motor M, 0.
The brake is applied for one second (#166), and the drive of the zoom motor M is stopped (#168). Thereafter, the processing flow moves to an overrun error lag subroutine (#170) in order to check whether the photographic lens 12 has overrun a predetermined position.

Next, the photometry/distance measurement subroutine will be explained with reference to FIG. In the JFJ light/lpJ distance subroutine, first, an AFES signal for turning on the photometry/distance measurement circuit is output (#180). Next, the serial communication clock SCK is used as the operating clock for A/D conversion.
A signal is output (#182), and after outputting a predetermined number of clocks,
A CSI signal is output to specify the data transmission destination (#184). Next, the AFES signal output is stopped in order to set photometry/distance data (9186), and the SCK signal, which is a serial communication clock, is output (#18).
8). In synchronization with this, the AFED signal for reading the photometry/distance measurement data is manually input (#190), and after the reading of the photometry/distance data is completed, the C is used to turn off the photometry/distance measurement circuit.
The output of the 5I signal is stopped (#192).

The signal timing and the like in the photometry/distance measurement operations described above will be explained with reference to FIG. 18. First, referring to (1) in FIG. 18, when the AFES signal becomes L, photometry and distance measurement are started. When the AFES signal becomes L, Δ# synchronizes with this.
The SCK signal, which is the operating clock for the j-light/fiFj distance circuit, generates 512 pulses every cycle. During this time, A/D conversion of the photometer and distance measurement values is performed. Then, when the CSI signal becomes L, the SCK pulse signal is synchronized and the CPU controls the AFED, photometry data, and distance measurement data in that order.
Output for 1. Both of these data are transferred as 8-bit serial data. For example, the relationship between the pulse of the serial communication clock SCK when photometric data (1) is output and the AFED output at that time is shown in an enlarged manner at the bottom of (1) in FIG. 18. AFE
Referring to diagram D, one bit of photometric data is transmitted every cycle of the SCK signal. In Figure 18 (
2) describes the details of the photometry data and distance measurement data. Referring to this figure, although the photometric data is 8-bit data, the upper 5 bits represent an integer and the lower 3 bits represent a decimal. This data is a BV value and represents the brightness of the subject.

Although the l1JJ distance data is 8-bit data, only the lower 5 bits are used, and this distance data represents the distance to the subject using a predetermined zone number. FIG. 19 shows the relationship between the distance to the subject and the zone number that is the distance measurement data at that time.

FIG. 20 is a flowchart showing the subroutine of AZ calculation. Referring to FIG. 20, when the processing flow is transferred to the AZ calculation subroutine, filtering (#
200) is performed and a reference table is created (#
202).

This filtering is performed for the following purposes.

When auto zooming is performed continuously, the subject may move out of the distance measurement area. When the subject moves out of the distance measurement area in this way, the distance to the background is measured, resulting in a zoom state similar to when the subject is at infinity, and the zooming operation becomes less smooth. Especially when the subject is moving, there is a high probability that this phenomenon will occur.

Therefore, by filtering the distance measurement data, distance measurement data that does not correspond to the subject distance is invalidated, and this is done in order to smooth the zooming operation.

As a method of this filtering, for example, if the same data is obtained a plurality of times, a method may be considered in which the data is made valid. In other words, if there is any sudden data among a plurality of consecutive data, that data is invalidated. However, this method cannot be applied when the subject is moving forward and backward relative to the camera. Another possible method is to compare the distance measurement data from the previous time, and if the difference is greater than a certain value, the current data is invalidated. The latter method has the advantage that even if the distance measurement circuit itself has an error of about ±1 zone in the distance data, such distance measurement error can be absorbed.

Next, the reference table will be explained. The reference table is a table for referring to the zoom stop position when the subject distance is in AZ mode.

An example of such a lookup table is shown in FIG. Referring to Figure 21, the reference table is table (1)
and table (2). Table (1) shows the distance data determined based on the subject distance shown in FIG.
This is for reference. This parameter D represents the actual distance in mm. This parameter D and the magnification data β determined in advance according to the shooting mode
The sunspot distance f is determined by calculating the product of .

Data (2) is A based on the sunspot distance f which is the calculation result.
The stop position of the photographing lens during Z mode is expressed as a zoom position. Both table (1) and table (2) are created on the RAM of the control CPUI.

In the remote control mode, the auto-zoom subject fε rate can be selected depending on the content of the received signal. Number of people photographed (
(one person, two people, three people, many people)), and each mode has a predetermined imaging magnification β. For example, if the number of subjects is one, β-17
30, for 2 people it is β-1750, for 3 people it is β-1/70, and for many people it is β-1/12
It has a predetermined imaging magnification β of 0. By calculating the product of this imaging magnification β and the parameter D, the sunspot path @f is obtained.

FIG. 22 shows an example of auto-zooming during remote control photography.

Returning to the AZ calculation routine in FIG. 20, after the focal length f corresponding to the stop position is determined (#204), the driving direction of the photographing lens is calculated (#206). The calculation of this driving direction is determined by comparing the current stop position of the photographing lens with the stop position corresponding to the obtained focal length f using the stop positions in table (2) shown in FIG. be done.

Next, the AE calculation subroutine will be explained.

FIG. 23 is a flowchart of the AE calculation subroutine. Referring to FIG. 23, in the AE calculation subroutine, it is first determined whether the shooting mode is the AZ mode (#210), and if it is the AZ mode, it is determined whether the release switch S2 is turned on. (#224
), not in AZ mode or release switch S2
is on, the zoom position will be read (#2
12).

Note that the reason why it is determined in step #224 whether or not the release switch S2 is turned on is to determine whether or not photography is being performed with release priority.

After the zoom position is read in step #212, the aperture F value is determined. The reason why the aperture F value is determined after the zoom position is read in this way is that the aperture F value of the photographing lens 12 is different from the zoom position. Note that if the release switch S2 is off in step #224, A
The open F value is adopted at the stop position as a result of Z calculation (#
226), the processing flow moves to step #214. Note that FIG. 24 shows a table (3) showing the relationship between the zoom position and the aperture F value (AVg). Furthermore, table (3)
is provided on the ROM or RAM of the control CPUI.

Next, returning to the AE calculation subroutine, after the open F value is determined, the ISO information is read (#216), the shutter control value is calculated (#218), the state of charge is read (#220), Other AE information is displayed in the finder (#222).

Figures 25A and 25B are step #216 in Figure 23.
It is a figure specifically explaining the content of reading the Sl○ information explained in . The ISO sensitivity representing the sensitivity of the film and the ISO code corresponding to χ·1 are as shown in FIG. 22A. The ISO sensitivity is expressed as an Sv value, and the Sv value for the ISO sensitivity is shown in parentheses next to the ISO sensitivity. Next, see section 25B on how to convert from ISO code to Sv value.
This will be explained with reference to the figure. When ISO information is read, first the ISO code is read as the lower 3 bits of 8 bits. In this case, the data of the upper 5 bits is 1. This state is shown in No. 25B (1). Next, the data shown in (1) is inverted to become the data shown in FIG. 25B (2). 03H is added to this as shown in FIG. 25B (3) and converted into a film sensitivity Sv value. This value corresponds to the numerical value shown in parentheses next to the ISO sensitivity in the film sensitivity table shown in No. 25 AI. Next, the shutter control value calculation shown in step #218 in FIG. 23 will be explained. The shutter control EV value EVc is EVc-BV+Sv-(AVo(fx)-AV
.

(f-38)) ... (1
).

This shutter control EV value changes the zoom position to the focal length Mfx
This is the case when expressed as . Here, EVc: shutter control EV value BV: photometric data representing subject brightness (see Figure 18) Sv: film sensitivity (see Figure 25) AV (f,): zoom position (focal length) of 18 mm Open f-number A Vo (r-38): When the focal length is 38 mm, that is, the open f-number at the wide end.

That is, the control EV value represents the control EV value when comparing the case where the photographing lens 12 is at the wide end. When the calculated EVc is smaller than EVt+, which is the threshold value for determining whether or not to use the flash mode, the photographing mode is automatically set to the flash mode. The above is an AE calculation.

Next, calculations in flash mode will be explained.

In /ii calculation of flash mode, shutter control (flash emission) AV value AVT in flash mode
seek. The calculation formula is AVT-IV+Sv-DV-(AV(fx)
−AV (f-38)) ...(2). here, ! ■=Represents flash illuminance and is expressed as a logarithm of the guide number.

DV: represents the distance to the subject and is expressed as the logarithm of the distance.

The shutter control AV value in flash mode, which is calculated by l and a as shown above, is calculated as shutter control E by the following calculation.
Converted to VI.

EVc=F(AVT)-(3) where F() represents a function.

FIG. 26 is a flowchart showing the contents of the BriZoom subroutine. Here, pre-zoom means that the lens barrel 21
This refers to the operation to always reduce the play between the cam groove 31 and the pin 33 in the same direction.

FIG. 27 is a sectional view of the lens barrel section. Referring to FIG. 27, the lens barrel 21 is provided with a cam ring 32, and the cam ring 32 is provided with a cam groove 31. A pin 33 is moved along the cam groove 31 via a lens frame 34 provided on the outer periphery of the photographic lens 12 so that the photographic lens 12 is moved along the cam groove 31 to a predetermined focal length. Ru.

As shown in FIG. 27, the width of the pin 33 is smaller than the width of the cam groove 31. Therefore, depending on the moving direction of the photographing lens 12, there is a certain amount of play, and even if the lens barrel 21 is rotated by the zooming motor M1, the amount of rotation of the zooming motor M and the amount of movement of the photographing lens 12 are not proportional. (a) of FIG. 27 shows the positional relationship between the pin 33 and the cam groove 31 when the zoom direction is the wide direction, and (b)
) indicates the relationship when the zoom direction is the telephoto direction.

Referring to FIGS. 27(a) and 27(b), when the zoom direction is different, an error of Δd occurs in the lens position even at the same zoom position, and the optical performance deteriorates. Therefore, when the zoom direction in Fig. 27(a) is the wide direction, minute zooming is performed in the telephoto direction at the initial stage of release, and the zoom direction in Fig. 27(b) is always
By reducing the backlash in the same direction, the error Δd in lens position at the same zoom position is virtually eliminated.

Returning to the flowchart of the zoom in Fig. 26, first check whether the previous zoom direction was the wide direction or not.
(#250), and if so, it is necessary to perform a brizoom to eliminate the error of Δd, so in order to rotate the zoom motor M in the normal direction,
A signal is output (#252). Next, a constant rotation time (ΔTl) is secured (#254), and the zoom motor M
, the zcw and zccw signals are output (#256) to apply the brakes to
After the zoom motor is secured ((#258), the output of the zcw and zccw signals is stopped to turn off the zoom motor (#258).
260). It should be noted that if step #250 is the previous zoom direction or the wide direction, there is no need to perform the pre-zoom, so the process flow returns as is.

Note that the braking time (8T2) is shorter than the time (ΔTs) required to actually stop the motor rotation. This is to keep the release time lag to the minimum necessary.

It's actually a zoom motor M.

is stopped during lens set (d), which will be explained later. Further, by configuring the drive power source with a constant voltage or constant current circuit, the amount of movement of the photographic lens 12 can be kept constant at all times.

FIG. 28 is a flowchart showing the focusing/exposure subroutine. Focusing and exposure are carried out by simply transmitting focus data and shutter control data to the shutter block 3 and outputting an STR signal instructing the start of focusing.

Referring to FIG. 28, in the focusing/exposure subroutine, the data output edge is first specified, and the C52 signal is output to turn on the shutter block (#22
8). Next, the SCK signal, which is a serial communication clock signal, is output (#282), and the focus data (lens set data) and shutter control data are output (#284).
), an STR signal is output for a command to start focusing (9286). Next, the process waits for a predetermined time until the exposure is completed (3288), and the output of the STR signal is stopped to turn off the shutter block 3 (#290).
, the output of the C52 signal is stopped (#292), and the LED display of the finder (not shown) is turned off (#294).

In addition, in the case of flash mode, the flash trigger signal TRG (see the electrical circuit diagram in Figure 5) is automatically output from the shutter block 3 to the flash block 5 by setting bit 7 (b7) of the shutter control data. be done.

Next, the zoom position reading subroutine will be explained. FIG. 29 is a flowchart showing the zoom position reading subroutine. Referring to FIG. 29, in the zoom position reading subroutine, a reference table (4) is first created (#300), a hexadecimal signal from the zoom encoder is read ($302), and the signal is used as an address. , the zoom position data is accessed, and the zoom position is determined (#304).

FIG. 30 is a diagram showing the zoom position reading reference table (4) described in step #300 of FIG. 29. 30th
Referring to the figure, the address is expressed using the lower 5 bits of 8 bits, and the address expressed as a 2-digit hexadecimal number corresponds to decimal zoom position data. Next, we will explain how to read this table by giving an example. For example, when 13H is read as a zoom encoder signal, zoom position data 8 (decimal) is obtained using this 13H as an address. In this case, the representative f value is 70 mm from the zoom encoder explanatory diagram of FIG. 4. Note that the fact that the zoom position data is O indicates that the zoom position data is impossible.

Next, the overrun search subroutine will be explained. FIG. 31 is a flowchart showing the overrun check subroutine. In the case of overrun, if the photographing mode is AZ mode, the photographing lens is redriven until it reaches the target position, and if it is not AZ mode, it is redriven only when it is at an irregular position. Note that the irregular position here means that the photographing lens 12 is located between the wide end and the retracted position.

In the overrun check subroutine, the zoom position is first read (#310), and it is determined whether the read zoom position is the stop position of the photographic lens 12 (#312), and if it is not the stop position, the AZ mode is selected. If it is not the AZ mode, it is determined whether the position is irregular (#316), and if the position is not irregular, the processing flow returns. Step #31
If the zoom position read in step 2 is the stop position, the process returns directly. When it is determined in step #314 that the mode is AZ mode, the driving direction is calculated from the stop position (#320) and zooming is performed (#32).
2). When it is determined in step #316 that the position is irregular, the driving direction of the photographing lens 12 is set to the telephoto direction, since escaping from the irregular position is always by driving the lens in the telephoto direction (#31 g). After that, zooming is performed (#322).

Next, the driving direction calculation subroutine will be explained. Third
FIG. 2 is a flowchart of the driving direction calculation subroutine. Referring to FIG. 32, in the drive direction calculation subroutine, the zoom position is first read (#340).

Next, it is determined whether the zoom position is larger than the stop position by comparing the sizes of the numbers at the stop position (
#342). If it is determined that the zoom position is larger than the stop position, the drive direction is set to the telephoto direction (C#344), and in the opposite case, the drive direction is set to the wide direction (#346). This driving direction is controlled by C.
Written on the PUI's RAM.

FIG. 33 is a diagram for explaining the timing at the time of release when pre-zooming is performed.

Referring to FIG. 33, when the release switch S2 is turned on, the zCW for starting normal rotation of the zoom motor M.
A signal is output, and then a zccw signal for stopping the zoom motor M is output. The speed change of the zoom motor M at this time is written next to Ml in FIG. 33. Referring to this figure, when the release switch S2 is turned on, the zoom motor M is rotated in response to the forward rotation start signal and the brake signal, and then the zoom motor M is stopped after undergoing inertia rotation. . The rotation start-up time is represented by (a), the braking period is represented by (b), and the inertial rotation period is represented by (c), as shown in the figure. When the BriZoom ends, a signal CS2 designating the data transmission destination is output, and the signal is transmitted to the shutter block 3. In other words, serial communication clock SCK
is output, and in synchronization with this, an output signal 5HTD that outputs focus data and shutter control data is output. After the focus data and shutter control data are output, a focusing start command signal STR signal is output. As a result, the black point alignment shown in the lower part of FIG. 33 is started, and the lens is set for focusing. The period required for this lens set is, for example, approximately 150 msec, and this period is represented by (d). After focusing is completed, the shutter is opened and closed. Before the shutter is opened and closed, a lens stabilization period (e) for stabilizing the lens is maintained, and then exposure (f) is performed. Referring to the focusing signal and the operation diagram of the zoom motor M1 in FIG. 33, the pre-zoom and the associated inertia rotation of the zoom motor M must be completed before the focusing is completed.

That is, the time represented by ΔT in the figure needs to be positive. Note that after the release switch S2 is turned on,
The release time lag until focusing is completed is about 0.4 seconds at most.

Next, the timing of transmitting data to the shutter block at the time of release shown in (e) and (g) of FIG. 33 will be explained. FIG. 34A is a diagram showing details of data transmission timing to the shutter block at the time of release. Referring to FIG. 34, when a signal C82 designating a data transmission destination to the shutter block is output, a serial communication block SCK is output in synchronization with this. In response to each cycle of this serial communication clock SCK signal, 8-bit shutter data 5HTD is serially output in the order of focus data and shutter control data. After the focus data and shutter control data are output, a black point alignment start command signal STR is output. The contents of the shutter data 5HTD will be explained with reference to the diagram m34B. The shutter data 5HTD includes focus data and shutter control data EVo. Both the focus data and shutter control data Evc are 8-bit data, but the focus data uses the lower 5 bits of the 8 bits, and the upper 3
The bit is set to zero. The shutter control data EVc indicates flash mode or non-flash mode by the most significant bit, the next 5 bits represent an integer, and the lower 2 bits represent a decimal. Note that when the most significant bit is 1, it represents a flash mode, and when it is 0, it represents a non-flash mode.

Next, details of the shutter control data Evc explained in FIG. 34B will be explained with reference to FIGS. 35A and 35B. FIG. 35A is a graph in which the aperture value (F value) is plotted on the Y axis and the shutter opening time is plotted on the X axis. Referring to FIG. 35A, the smaller the aperture value (F value), the longer the shutter opening time To becomes. The area of the triangle in FIG. 35A corresponds to the exposure amount.

FIG. 35B is a diagram showing an example of the EVo value of shutter control data. Referring to FIG. 35B, once the shutter control data EV and value are determined, the corresponding shutter opening time To is determined. In this case, the shutter opening time To
is expressed in ms.

Next, another embodiment of the remote control shown in FIG. 2C will be described. FIG. 36 is a diagram showing a female embodiment of the remote control device shown in FIG. 2C.

The remote control 30', which also serves as a lens cap, has a mark 30'a indicating the person's face to shoulder, a mark 30'C indicating the half of the body from the face to the copper, and a mark 3 indicating the whole body.
0' d, and includes push buttons 313', S15' and S16' arranged corresponding to each mark. This remote control 30' is configured to set the photographing magnification β of the camera body to 1/30 when the push button S13' is pressed.
When the push button S15' is pressed, the photographing magnification β is set to 1/70, and when the push button 316' is pressed, the photographing magnification β is set to 1/70.
The respective remote control command signals are outputted so that the distance is reduced to 1/120. The camera body drives the zoom motor M1 according to these remote control signals and the shooting distance to the subject, and when the pushbuttons S13', S15' and 816' are pressed, the subject's face to shoulders are respectively captured. Photographing lens 1 is set so that the photographing magnification is 1/30, the photographing magnification is 1/70 when photographing half the body, and the photographing magnification is 1/120 when photographing the whole body.
2 is driven.

[Effects of the Invention] As described above, in the camera according to the present invention, the focal length of the photographing lens is automatically determined based on the photographing magnification selection signal of the subject from the remote device and the subject distance information, and the focal length of the photographing lens is automatically determined. The photographing lens is driven as follows. Therefore, the photographing magnification desired for remote photography is selected, and the auto zoom magnification is automatically determined from this and the subject distance.

As a result, the magnification of the subject can be set remotely, without relying solely on the camera's judgment as in the past.
It is possible to provide a camera with fewer failures in photographing due to auto zoom.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the main parts of this invention, and the second
Figures A to 2C are external views of the camera body to which this invention is applied, Figure 3 is a view showing the lens barrel of the photographing lens of the camera to which this invention is applied, and Figure 4 is a view of the zoom lens. FIG. 5 is an explanatory diagram of an encoder, and FIG. 5 is an electric circuit diagram of a camera capable of auto zoom and remote photography according to the present invention.
FIG. 6 is a diagram showing display segments of a display LCD,
FIG. 7 is a diagram showing the transition of the shooting mode of the camera capable of auto zoom and remote shooting according to the present invention;
FIG. 9 is a flowchart showing the main routine of a camera capable of auto zoom and remote photography according to the present invention, FIG. 9 is a flowchart of the main switch So check routine, and FIG. 10A is a diagram showing remote control signals. FIG. 10B is a diagram showing remote control signal data and its contents, FIG. 11 is a flowchart showing a remote control determination subroutine, FIG. 12 is a flowchart of the photometry switch S, ON routine, and FIG. 14 is a flowchart showing the routine when the shooting mode switch is on; FIG. 15 is a flowchart showing the routine when the shooting mode switch is on;
FIG. 16 is a flowchart showing the zoom switch-on routine, FIG. 16 is a flowchart showing the zooming subroutine, FIG. 17 is a flowchart showing the photometry/distance measurement subroutine, and FIG. 18 is a flowchart showing the photometry/distance measurement signal timing. FIG. 19 is a diagram showing the relationship between object distance and ilP+distance data, FIG. 20 is an AZi calculation subroutine low chart, and FIG.
Figure 1 is a diagram showing the contents of AZm calculation, and Figure 22 is a diagram showing an example of auto zoom when shooting with a remote control.
FIG. 23 is a flowchart showing the AE calculation subroutine, FIG. 24 is a diagram showing a table (3) showing the relationship between the zoom position and the open F value, and FIGS.
Figure B is a diagram showing the process of reading film sensitivity information, Figure 26 is a flowchart of the BriZoom subroutine, Figure 27 is a cross-sectional view of the lens barrel, and Figure 28 is a diagram showing the process of focusing and focusing. 29 is a flowchart showing the zoom position reading subroutine, FIG. 30 is a flowchart showing the zoom position reading reference table (4), and FIG. 31 is a flowchart showing the overrun check subroutine. Yes, 3rd
FIG. 2 is a flowchart showing the drive direction calculation subroutine, FIG. 33 is a diagram showing the timing at the time of release, and FIGS. 34A and 34B are diagrams showing the timing of data transmission to the shutter block at the time of release. , FIG. 35A, and FIG. 35B are diagrams showing specific examples of shutter control data, and FIG. 36 is a diagram showing a modified embodiment of the remote control. In the figure, 1 is a control CPU. 2 is an Mj light/distance measurement circuit, 3 is a shutter block, 4 is a motor driver section, 5 is a flash block, 6 is a display section, 10 is a main switch operation lever 11 is a release button, 12 is a photographic lens, 13 is an auto zoom Mode button, 14 is zoom operation lever, 15 is display LCD, 16
51 is a self-mode button, 51 is a lens driving means, 52 is a focal length determining means, 53 is a distance measuring means, 54 is a photographing magnification selection means, 55 is a transmitting means, and 56 is a remote control device. Figure 1 Figure 2 Δ Figure 105 Main switch operation key 2 (So) Release button (51, 52) 2: Lens attached to #' 13: Auto zoom = -do; r: y>C3s) 14, Sum A4 1. y<-(S4,5s) 1S: Display LC
D 16゛ Shooting 7-Dhoken (S + z) 30: Lens Kima l A 32゛ Ri7 Funzuzu L Hit Figure 28 Figure 10A Figure 2C Figure 10B Figure j$3 Figure 2o; 22; Sumenko qI' 23, I51 Imoro Shigoto a 24, d Kaedecho 0 26: Yunko 9'γ Hun (56%-510) lvl+
:;l:Mi)ri "Motor 31:nmu 33; Engraving on the underside of the pin (no change in content) No. 412 H: OFF 9 Figure name 11 Figure 12 Figure 13 Figure 1-41-Figure 15 Figure 1b Figure 17 Figure 1g Figure 19 Figure 20 Figure 26 Chief meat 1) Figure 21 Chief ram (2) Figure 2z (α) - Two people M call (C) Nisu confrontation (d) Many Gin Figure 23 Figure 24 Chi 7 no L. (3) Figure 25A Figure 258 ↓ Sv: Enter范Mufuzaj＄27Figure 32: Tomu 瑣34: Jade frame 35: Lens 1Figure 28J829Figure 30Chiffish 4) Figure 31Figure 32Figure 36B miracle) Procedural amendment book Kaheisei April 24, 2013 2. Name of the invention: Camera with an auto-zoom mechanism 3. Relationship with the person making the correction case.

Claims (2)

[Claims] (1) A distance measuring means for measuring the distance to a subject, a photographing lens capable of changing the focal length, a photographing magnification selection means for selecting a photographing magnification when photographing the subject, and the photographing magnification selection means a remote control means comprising: a transmitter that outputs a predetermined signal in response to an operation; and a focal length determination device that determines the focal length of the photographic lens based on the predetermined signal and object distance information obtained from the distance measuring means. A camera having an auto-zoom mechanism, comprising: means for driving the photographing lens so that the focal length is determined by the focal length determining means. (2) The camera having an auto zoom mechanism according to claim 1, wherein the photographing magnification selection means selects the photographing magnification by specifying the number of subjects.