JP2009290787A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera that makes it possible to constantly obtain a correctly oriented image regardless of the type of an attached shooting lens without diminishing the photographer's convenience. <P>SOLUTION: After the power to the camera is turned on, a body CPU 220 communicates with the lens CPU 105 of an interchangeable lens 100 and reads lens information (Step S4). It is determined whether the interchangeable lens 100 is an ordinary interchangeable lens according to the read lens information (Step S6). When the lens is not an ordinary interchangeable lens and a special interchangeable lens is attached, image data are inverted at an image processing circuit 212 (Step S7). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a camera in which a taking lens can be exchanged.

  In general, since the depth of focus is not so deep with a normal taking lens, it is difficult to take a photograph in focus from the very close to the distant view. In order to take a photograph in focus from such a very close distance to a distant view, a photographing lens having a deep depth of focus using a small-diameter wide-angle optical system and a relay optical system may be used. However, it is known that when an imaging lens having such a configuration is used, the observed image is inverted when the subject image is observed through a normal viewfinder or the like. As a technique for preventing such reversal of the observation image, it is conceivable to add a relay optical system. However, in this case, since a relay optical system is added, an increase in size as a photographing lens is inevitable.

As a technique for preventing the reversal of the observation image without adding a relay optical system, the technique of Patent Document 1 has been proposed. In the method of this patent document 1, when an optical lens for a normal video camera is attached to an image capturing device, it is assumed that there is no inversion of the image, and the image obtained via the image sensor (CCD) is inverted vertically and horizontally. If the optical lens for film is attached to the image capturing device, the image is inverted, and the image obtained via the image sensor (CCD) is inverted vertically and horizontally. After that, the data is input to the image processing unit.
JP 2000-184296 A

  Here, in the method of Patent Document 1, there is no specific disclosure as to how the microprocessor determines the type of optical lens. If the inversion / non-inversion of the image is switched according to the photographer's instruction, the convenience for the photographer is impaired.

  The present invention has been made in view of the above circumstances, and provides a camera that can always obtain an image of the correct orientation without impairing the convenience of the photographer and regardless of the type of the taking lens to be mounted. The purpose is to do.

  In order to achieve the above object, the camera according to the first aspect of the present invention captures an image of a subject through the photographing lens and obtains an image based on the image of the subject in a camera having a replaceable photographing lens. Image pickup means, determination means for determining whether the photographing lens is a first type lens or a second type lens, and image processing means for processing an image acquired by the image pickup means The image processing means, when the determining means determines that the photographing lens is the second type lens, inverts the image obtained by the imaging means and outputs the inverted image. It is characterized by that.

  In order to achieve the above object, the camera according to the second aspect of the present invention is a camera in which a photographic lens is replaceable. The camera captures an image of the subject through the photographic lens and displays an image based on the image of the photographic subject. An imaging means for acquiring, a discrimination means for discriminating whether the taking lens is a first type lens or a second type lens, and the discrimination means, the taking lens is of the second type. When it is determined that the lens is a lens, the image acquired by the imaging unit is inverted and output with respect to the image acquired by the imaging unit when the photographing lens is the first type lens. A reverse image processing mode, and a standard image processing mode for outputting an image acquired by the imaging means without being reversed when the photographing lens is determined to be the first type lens. An image processing unit that, characterized by comprising a display means for displaying the image output from said image processing means.

  In order to achieve the above object, a camera according to a third aspect of the present invention is a camera in which a photographic lens is replaceable, and images a subject through the photographic lens, and an image based on the image of the subject. Imaging means for obtaining; discrimination means for discriminating whether the photographing lens is a first type lens or a second type lens; and display means for displaying an image obtained by the imaging means. And the display means displays an image obtained by inverting the top / bottom / left / right of the image obtained by the imaging means when the discrimination means determines that the photographing lens is the second type lens. It is characterized by displaying.

  According to the present invention, it is possible to provide a camera that can always obtain an image in the correct direction without impairing the convenience of the photographer and regardless of the type of the taking lens to be mounted.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a camera according to an embodiment of the present invention. The camera in the present embodiment is assumed to be a camera in which a photographing lens having an interchangeable lens 100 and a camera body 200 can be interchanged.

  The interchangeable lens 100 includes a photographing lens 101, an optical system driving mechanism 102, a diaphragm mechanism 103, a diaphragm driving mechanism 104, and a lens CPU 105. Although details will be described later, in the present embodiment, various interchangeable lenses 100 can be used according to the purpose of photographing and the like.

  The taking lens 101 is an optical system for condensing a luminous flux of a subject (not shown) to form a subject image on the image sensor 206 in the camera body 200. The optical system driving mechanism 102 drives the lens included in the photographic lens 101 in the optical axis direction (the one-dot chain line direction in the drawing). By driving the lens in the photographic lens 101, the focus and zoom state of the photographic lens 101 are adjusted.

  The diaphragm mechanism 103 adjusts the light amount of the light beam incident on the image sensor 206 via the photographing lens 101. The aperture drive mechanism 104 performs opening / closing drive of the aperture mechanism 103.

  The lens CPU 105 is configured to be able to communicate with a sequence controller (body CPU) 220 in the camera body 200 via the communication terminal 106 when the interchangeable lens 100 is attached to the camera body 200. The lens CPU 105 performs control of the optical system drive mechanism 102 and control of the aperture drive mechanism 104 according to the control of the body CPU 220. The lens CPU 105 holds lens information such as the type of the interchangeable lens 100 and the focal length information of the photographing lens 101, and the body is connected via the communication terminal 106 when the interchangeable lens 100 is attached to the camera body 200. The lens information is also transmitted to the CPU 220.

  The camera body 200 includes a focal plane shutter 201, a shutter drive mechanism 202, a dustproof filter 203, a dustproof filter drive circuit 204, various filters 205, an image sensor 206, an image sensor drive circuit 207, and a preprocessing circuit 208. A data bus 209, an SDRAM control circuit 210, an SDRAM 211, an image processing circuit 212, a video signal output circuit 213, a liquid crystal monitor drive circuit 214, a finder (F) liquid crystal monitor 215, and a rear liquid crystal monitor 216. A compression / decompression circuit 217, a recording medium control circuit 218, a recording medium 219, a sequence controller (body CPU) 220, a flash memory control circuit 221, a flash memory 222, various switches 223, and an attachment / detachment detection switch 224. And switch detection times 225, the input-output circuit 226, and a communication circuit 227.

  The focal plane shutter 201 is disposed in front of the image sensor 206 and shields the photoelectric conversion surface of the image sensor 206. The shutter drive mechanism 202 opens and closes the focal plane shutter 201. At the time of shooting, the exposure amount of the image sensor 206 can be controlled by controlling the opening amount of the aperture mechanism 103 in the interchangeable lens 100 and the opening time of the focal plane shutter 201.

  The dustproof filter 203 is disposed in front of the various filters 205 and the image sensor 206, and prevents dust from adhering to the various filters 205 and the image sensor 206. The dustproof filter driving circuit 204 causes the dustproof filter 203 to vibrate to remove dust adhering to the dustproof filter 203.

  The various filters 205 are various optical filters such as an infrared cut filter that removes an infrared light component of a light beam incident on the image sensor 206 via the photographing lens 101 and a low-pass filter that removes a high-frequency noise component.

  The image sensor 206 converts a subject image formed through the photographing lens 101 into an electric signal (image signal) by photoelectric conversion. The image sensor driving circuit 207 controls driving of the image sensor 206 in accordance with an instruction from the body CPU 220 via the input / output circuit 226 and controls reading of an image signal obtained by the image sensor 206.

  The preprocessing circuit 208 performs analog processing such as noise removal and amplification on the image signal read from the image sensor 206 via the image sensor drive circuit 207, and further converts the analog processed image signal into a digital signal (image data). Perform the conversion process. Note that the amplification factor at the time of amplification in the preprocessing circuit 208 is set by the body CPU 220.

  The data bus 209 is a transfer path for transferring various data such as image data obtained by the preprocessing circuit 208 and image data processed by the image processing circuit 212.

  The SDRAM control circuit 210 controls writing and reading of data to and from the SDRAM 211. The SDRAM 211 is a buffer memory for temporarily storing data obtained in the preprocessing circuit 208.

  The image processing circuit 212 reads out the image data obtained in the preprocessing circuit 208 and stored in the SDRAM 211 and performs various image processing. This image processing includes white balance correction processing for correcting the color balance of the image, color correction processing for correcting the color of the image, gradation correction processing for correcting the gradation of the image, and the like. Furthermore, in the present embodiment, the image processing circuit 212 also executes a process of inverting the image data up, down, left, and right when the interchangeable lens 100 is a special interchangeable lens. The special interchangeable lens will be described later.

  The video signal output circuit 213 reads the image data after image processing from the SDRAM 211, converts the read image data into a video signal, and outputs the video signal to the liquid crystal monitor drive circuit 214. The liquid crystal monitor drive circuit 214 drives the F liquid crystal monitor 215 and the rear liquid crystal monitor 216 according to the video signal input from the video signal output circuit 213, and displays an image on the screen of the F liquid crystal monitor 215 and the rear liquid crystal monitor 216. I do. The in-F liquid crystal monitor 215 is provided in a finder observation window provided on the back surface of the camera body 200, and displays an image for a user to observe a subject image on the finder. The rear liquid crystal monitor 216 is disposed on the rear surface of the camera body 200 and displays various images such as an image obtained by photographing. Here, in the present embodiment, it is possible to display the same image as the image displayed on the F liquid crystal monitor 215 on the rear liquid crystal monitor 216. Hereinafter, image display for the finder using the intra-F liquid crystal monitor 215 and the rear liquid crystal monitor 216 will be referred to as a live view operation. Note that the live view operation may be performed by only one of the in-F liquid crystal monitor 215 and the rear liquid crystal monitor 216.

  The compression / decompression circuit 217 reads image data after image processing from the SDRAM 211 and compresses the read image data in a predetermined compression format such as a JPEG method. The compression / decompression circuit 217 also reads compressed image data from the SDRAM 211 and decompresses the read image data when reproducing an image.

  The recording medium control circuit 218 controls writing and reading of data on the recording medium 219. The recording medium 219 is a memory card configured to be detachable from the camera body 200, for example, and records the image data compressed by the compression / decompression circuit 217.

  The body CPU 220 having a function as a control means performs control of each part in the camera body 200 such as control of the shutter drive mechanism 202 and control of the dustproof filter drive circuit 204 according to a control program stored in the flash memory 222. The body CPU 220 also has a function as a determination unit that communicates with the lens CPU 105 of the interchangeable lens 100 to acquire lens information and determines whether or not the interchangeable lens 100 is a special interchangeable lens according to the lens information. Yes. Furthermore, the body CPU 220 also has a function as sensitivity setting means for setting the sensitivity of the image sensor 206 (the imaging signal amplification factor in the preprocessing circuit 208) according to the type of the interchangeable lens 100.

  The flash memory control circuit 221 controls data writing to and reading from the flash memory 222. The flash memory 222 stores a control program read by the body CPU 220, various setting values of the camera body 200, and the like.

  The various switches 223 are switches that change states in response to various operation members for operating the camera body 200. The various operation members include a power switch for turning on or off the power of the camera body 200, a release button for giving a camera execution instruction to the camera, a playback button for giving an image playback instruction, and a menu screen display. Menu buttons for giving instructions, input keys for making various camera settings, and the like. The attachment / detachment detection switch 224 is a switch for detecting that the interchangeable lens 100 is attached to the camera body 200. The switch detection circuit 225 is a circuit that detects operation states of the various switches 223 and the attachment / detachment detection switch 224 and notifies the body CPU 220 of the detection result. When the operation of the operation member is detected via the switch detection circuit 225, the body CPU 220 executes control according to the operation content of the operation member.

  The input / output circuit 226 is an interface circuit that outputs a signal for controlling the shutter drive mechanism 202, the dustproof filter drive circuit 204, and the image sensor drive circuit 207 in response to an instruction from the body CPU 220.

  The communication circuit 227 is an interface circuit for performing communication between the lens CPU 105 of the interchangeable lens 100 and the body CPU 220 of the camera body 200.

  The operation of the camera shown in FIG. 1 will be described below. As described above, in the present embodiment, various interchangeable lenses 100 can be used depending on the purpose of photographing. In this case, depending on the type of the interchangeable lens 100, the direction (up / down / left / right) of the subject image formed on the image sensor 206 may be different.

  FIG. 2A shows an example in which an interchangeable lens (hereinafter referred to as a normal interchangeable lens) having a photographic lens 101a that does not include a relay optical system is used as an example of a first type lens. In the case of FIG. 2A, when the subject image is formed on the image sensor 206, the orientation of the subject image is reversed up and down and left and right with respect to the original direction (in the figure, only upside down is shown, but actually Will also flip left and right). For this reason, by performing upside down processing of the image data in the image processing circuit 212 or controlling the reading order of the image signals from the image sensor 206, the writing order of the image data to the SDRAM 211, etc. The observation image displayed on the monitor 215 and the rear liquid crystal monitor 216 is set to an appropriate orientation as shown in FIG. Of course, only the display image may be inverted vertically and horizontally.

  On the other hand, in FIG. 3A, as an example of the second type lens, an interchangeable lens (hereinafter referred to as a special interchangeable lens) including a photographing lens 101b having a small-diameter wide-angle lens 1011 and a relay optical system 1012 is used. An example is shown. Since the small-diameter wide-angle lens 1011 has a short focal length and a small aperture, the depth of focus can be increased as compared with the photographing lens 101a. Therefore, by using the taking lens 101b, it is possible to take an image that is in focus from the very close distance to the distant view that cannot be taken with the taking lens 101a. Here, in the example of FIG. 3A, the light beam that has passed through the small-diameter wide-angle lens 1011 forms a primary image at a predetermined position before forming an image on the image sensor 206, and then the image is applied to the image sensor 206 by the relay optical system 1012. It is a guided structure. For this reason, the direction of the subject image finally formed on the image sensor 206 is vertically and horizontally reversed with respect to the case of FIG. Therefore, when an image is displayed on the liquid crystal monitor 215 in the F and the rear liquid crystal monitor 216 by the same control as in FIG. 2A, the displayed observation image is as shown in FIG. ) Upside down.

  In this embodiment, as shown in FIG. 3A, it is automatically detected that a special interchangeable lens is attached to the camera body 200, and when the special interchangeable lens is attached, as shown in FIG. By inverting the image further, an observation image with the correct orientation is always obtained. Also, by using this image for recording, it is possible to reproduce the image data in the correct direction when reproducing the image data.

  FIG. 5 is a flowchart showing the operation of the camera in this embodiment. When a battery (not shown) is loaded in the camera body 200, the process in FIG. 5 is started. The body CPU 220 first determines from the output of the switch detection circuit 225 whether or not the power switch is turned on by a user operation (step S1). If it is determined in step S1 that the power switch is not turned on, the camera enters a sleep state. In the determination of step S1, when the power switch is turned on or when the power switch is turned on in the sleep state, the body CPU 220 starts supplying power to each part of the camera body 200 and each part of the interchangeable lens 100. (Step S2).

  Next, the body CPU 220 drives the dustproof filter 203 via the dustproof filter driving circuit 204 to remove dust attached to the dustproof filter 203 (step S3). Thereafter, the body CPU 220 communicates with the lens CPU 105 and reads lens information from the lens CPU 105 (step S4). After reading the lens information, the lens CPU 105 determines the type of the interchangeable lens 100 from the information indicating the type of the interchangeable lens 100 in the lens information, and sets various operation modes and parameters according to the determination result (step S5). .

  FIG. 6 is a diagram showing the relationship between the type of the interchangeable lens and the operation mode in the present embodiment. As shown in FIG. 6, in this embodiment, according to the type of the interchangeable lens, exposure mode setting, image processing setting (setting whether to invert image), live view operation setting, information display setting , ISO sensitivity is set.

  As shown in FIG. 6, the exposure mode in the case of a normal interchangeable lens can be set by the user from among a program mode, an aperture priority mode, a shutter speed priority mode, and a manual mode. Here, the program mode is a mode in which the body CPU 220 calculates the aperture value and the shutter speed according to a predetermined program so that the exposure of the image sensor 206 at the time of shooting is an appropriate exposure. The aperture priority mode is a mode in which the body CPU 220 calculates a shutter speed at which the exposure of the image sensor 206 at the time of shooting is an appropriate exposure while the aperture value is fixed. The shutter speed priority mode is a mode in which the body CPU 220 calculates an aperture value at which the exposure of the image sensor 206 at the time of shooting is appropriate while the shutter speed is fixed. The manual mode is a mode in which the user can manually set the aperture value and the shutter speed.

  The exposure mode for the special interchangeable lens can be set by the user only from the aperture priority mode and the manual mode. As described above, the special interchangeable lens uses the small diameter wide angle lens 1011. Since the small-diameter wide-angle lens 1011 has a small aperture as compared with a lens used for a normal interchangeable lens, the degree of freedom of adjustment of the diaphragm mechanism is less than that of a normal interchangeable lens. For this reason, the exposure mode in the case of the special interchangeable lens is fixed only to the aperture priority mode and the manual mode. If the aperture priority mode is used, it is possible to obtain an appropriate exposure by adjusting at least the shutter speed with the degree of freedom of adjustment of the aperture mechanism.

  Further, as shown in FIG. 6, the image processing setting in the case of a normal interchangeable lens is set to the standard image processing mode. That is, the image processing circuit 212 does not invert the image data. On the other hand, the image processing setting for the special interchangeable lens is the reverse image processing mode. That is, the image processing circuit 212 inverts the image data.

  Also, as shown in FIG. 6, the user can set the live view operation setting in the case of a normal interchangeable lens from the normal mode and the boost mode. Here, the normal mode is a mode in which the live view operation is performed by increasing or decreasing the sensitivity of the image sensor 206 (the amplification factor of the image signal in the preprocessing circuit 208) according to the brightness of the ambient light. In general, increasing the sensitivity of the image sensor 206 also amplifies noise. For this reason, in the normal mode, the live view operation is stopped when the amount of noise for the image exceeds a predetermined value. On the other hand, the boost mode is a mode suitable for display when the image is dark. In this boost mode, the live view operation is continued even when the amount of noise is equal to or greater than the predetermined amount. Further, when the image becomes dark and the color noise increases and the display with the proper color cannot be performed, the live view operation is continued with the monochrome display.

  Further, the live view mode in the case of the special interchangeable lens is only the boost mode. The small-diameter wide-angle lens 1011 has a small aperture as compared with a lens used for a normal interchangeable lens, and a dark image is easily captured as compared with a normal interchangeable lens. For this reason, only the boost mode is set.

  Further, as shown in FIG. 6, the information display setting in the case of a normal interchangeable lens is normal. In this case, the warning display that the special interchangeable lens is attached to the in-F liquid crystal monitor 215 or the rear liquid crystal monitor 216 performing the live view operation is not performed. On the other hand, the information display setting in the case of a special interchangeable lens is a warning display. In this case, a warning is displayed that the special interchangeable lens is mounted on the intra-F liquid crystal monitor 215 or the rear liquid crystal monitor 216 performing the live view operation.

  Also, as shown in FIG. 6, the ISO sensitivity setting for an ordinary interchangeable lens is AUTO. In the case of AUTO, the body CPU 220 sets ISO sensitivity (corresponding to the sensitivity of the image sensor 206) during live view operation or shooting according to conditions such as the brightness of the subject. On the other hand, the ISO sensitivity setting for a special interchangeable lens is fixed to ISO800. In this case, the ISO sensitivity at the time of shooting or the like is fixed to ISO 800 regardless of conditions such as the brightness of the subject. This brightens the image displayed during live view display. In FIG. 6, it is fixed to ISO 800, but ISO sensitivity higher than ISO 800 may be used.

  Here, returning to FIG. In step S5, after setting the operation mode with the settings shown in FIG. 6, the body CPU 220 determines from the information indicating the type of the interchangeable lens 100 in the lens information that the currently mounted interchangeable lens 100 is a normal interchangeable lens. Whether or not (step S6). If it is determined in step S6 that the currently mounted interchangeable lens is not a normal lens, that is, a special interchangeable lens, the body CPU 220 causes the image processing circuit 212 so that the observation image during the live view operation becomes an erect image. The image data inversion process is executed in step. Further, various settings for performing the live view operation in the boost mode are performed (step S7). On the other hand, if it is determined in step S6 that the currently mounted interchangeable lens is a normal lens, the body CPU 220 skips the process in step S7. After step S6 or step S7, the body CPU 220 instructs the liquid crystal monitor drive circuit 214 to start a live view operation (step S8). As a result, the observation image is displayed on one or both of the intra-F liquid crystal monitor 215 and the rear liquid crystal monitor 216.

  After starting the live view operation, the body CPU 220 calculates the exposure amount (aperture value, shutter speed) at the time of shooting by evaluating the brightness of the image data obtained via the image sensor 206 (step S9). ). When the exposure mode is the manual mode, the aperture value and shutter speed set by the user are used.

  Thereafter, the body CPU 220 determines whether or not the reproduction switch is turned on by the user's operation of the reproduction button (step S10). If the reproduction switch is turned on in the determination in step S10, the body CPU 220 controls the reproduction operation of the image data (step S11). In the image data reproduction operation, for example, the liquid crystal monitor drive circuit 214 is controlled to display a list of image data recorded on the recording medium 219 on the rear liquid crystal monitor 216. In this list display, when the user selects a desired image, the selected image data is reproduced and an image is displayed on the rear liquid crystal monitor 216. After such image data reproduction operation, the process proceeds to the next step. Further, in the determination at step S10, when the regeneration switch is not turned on, the body CPU 220 skips the process at step S11.

  After step S10 or S11, the body CPU 220 determines whether or not the menu switch is turned on by the user operating the menu button (step S12). When the menu switch is turned on in the determination in step S12, the body CPU 220 controls the menu setting operation (step S13). In the menu setting operation, for example, the liquid crystal monitor drive circuit 214 is controlled to display a menu screen on the rear liquid crystal monitor 216. When the user selects a desired item on the menu screen, the camera corresponding to the item can be set. This makes it possible to select the exposure mode shown in FIG. After such a menu setting operation, the process proceeds to the next step. If the menu switch is not turned on in step S12, the body CPU 220 skips step S13.

  After step S12 or S13, body CPU 220 determines whether or not the 1R switch is turned on by the user operating the release button (step S14). When the 1R switch is turned on in the determination in step S14, the body CPU 220 controls the photographing operation (step S15). In the photographing operation, for example, the focus of the photographing lens 101 is adjusted by driving the photographing lens 101 while evaluating the contrast of the image data obtained through the image sensor 206. Thereafter, when the 2R switch is turned on by the user operating the release button, the image sensor 206 is exposed while controlling the diaphragm mechanism 103 and the focal plane shutter 201 in accordance with the exposure amount obtained in step S9. The image data obtained by this exposure is processed by the image processing circuit 212 and then compressed by the compression / decompression circuit 217. Thereafter, the compressed image data is recorded on the recording medium 219. Note that if the 1R switch is not turned on in the determination of step S14, the body CPU 220 skips the process of step S15.

  After step S14 or S15, the body CPU 220 determines from the output of the switch detection circuit 225 whether or not the interchangeable lens 100 has been removed (step S16). When the interchangeable lens 100 is not removed in the determination in step S16, the body CPU 220 determines whether or not the power switch remains on (step S17). If it is determined in step S17 that the power switch remains on, the body CPU 220 executes the processes in and after step S9. On the other hand, when the power switch is OFF in the determination in step S17, the body CPU 220 stops the power supply to the interchangeable lens 100 (step S18), and then shifts the state of the camera to the sleep state.

  If the interchangeable lens 100 is removed in step S16, the body CPU 220 instructs the liquid crystal monitor drive circuit 214 to stop the live view operation (step S19). Next, the body CPU 220 stops the power supply to the interchangeable lens 100 (step S20). Thereafter, the body CPU 220 determines whether or not the interchangeable lens 100 is attached (step S21). When the interchangeable lens is not attached in the determination in step S21, the body CPU 220 stands by while performing the determination in step S21. When the interchangeable lens 100 is attached in the determination in step S21, the body CPU 220 executes the processing after step S2.

  As described above, according to the present embodiment, the type of the interchangeable lens 100 is automatically determined from the lens information, and when a special interchangeable lens is attached, an image acquired via the image sensor 206 is normally displayed. This is reversed with respect to the case where the interchangeable lens is mounted. Accordingly, an erect image can be displayed during the live view operation, and an erect image can be recorded even during image recording.

  In addition, since the special interchangeable lens has a lens having a smaller diameter than that of a normal interchangeable lens, an image acquired via the image sensor 206 is darker than that in a case where a normal interchangeable lens is attached. In the present embodiment, when a special interchangeable lens is attached, the sensitivity of the image sensor 206 (the amplification factor of the image signal in the preprocessing circuit 208) is made higher than when a normal interchangeable lens is attached. ing. Thereby, an image displayed during the live view operation and an image recorded on the recording medium 219 are not darkened more than necessary.

  Here, the technique of the above-described embodiment can also be applied to a lens interchangeable single-lens reflex camera as shown in FIG. FIG. 7 is a diagram showing a configuration of a characteristic part of the interchangeable lens single-lens reflex camera. Since the basic configuration other than that shown in FIG. 7 is the same as that shown in FIG.

  As shown in FIG. 7, in the single-lens reflex camera, a quick return mirror 231 is disposed in front of the image sensor 206. The quick return mirror 231 has a half mirror at the center, and transmits a part of the light beam incident on the camera body 200 via the interchangeable lens 100 and reflects a part thereof. A focusing screen 232 is arranged in the direction in which the light beam is reflected by the quick return mirror 231. The light beam reflected by the quick return mirror 231 forms an image on the focusing screen 232. The subject image formed on the focusing screen 232 becomes an erect image through the pentaprism 233. The user can observe the subject image via the eyepiece optical system 234.

  Further, a sub mirror is provided on the back surface of the half mirror portion of the quick return mirror 231, and the light beam transmitted through the quick return mirror 231 is reflected by the sub mirror. A distance measuring unit 235 is provided in the direction in which the sub-mirror reflects the light beam. The distance measuring unit 235 is, for example, a phase difference AF type distance measuring unit. By using the distance measuring unit 235, it is possible to adjust the focus of the photographing lens 101.

  In the single-lens reflex camera as shown in FIG. 7, the live view operation can be executed only when the quick return mirror 231 is retracted from the photographing optical path. At this time, the setting shown in FIG. 6 is made. Thus, the special interchangeable lens is mounted, and the subject image formed on the image sensor 206 as shown in FIG. 8A can be reversed as shown in FIG. 8B.

  Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications and applications are naturally possible within the scope of the gist of the present invention. For example, in this embodiment, image inversion is performed in the image processing circuit 212, but image inversion is controlled by controlling the order of reading signals from the image sensor 206, the order of writing image data to the SDRAM 211, and the like. You can go.

  In the above-described embodiment, a camera in which the interchangeable lens 100 is directly attached to the camera body 200 is illustrated. However, depending on the types of the camera body 200 and the interchangeable lens 100, an adapter called a flange back adapter may be used. It may be necessary to attach the interchangeable lens 100. Here, in the present embodiment, information indicating that the interchangeable lens 100 is a special interchangeable lens is acquired by communication between the lens CPU 105 and the body CPU 220. Therefore, in the present embodiment, it is possible to determine whether or not the interchangeable lens 100 is a special interchangeable lens even with respect to the interchangeable lens 100 mounted via the flange back adapter.

  Further, the above-described embodiments include various stages of the invention, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in the embodiment, the above-described problem can be solved, and this configuration requirement is deleted when the above-described effects can be obtained. The configuration can also be extracted as an invention.

It is the figure which showed the structure of the camera which concerns on one Embodiment of this invention. FIG. 2A is a diagram illustrating a configuration of an example of a first type lens, and FIG. 2B is a diagram illustrating an observation image when the first type is used. FIG. 3A is a diagram illustrating a configuration of an example of a second type lens, and FIG. 3B is a diagram illustrating an observation image when the second type is used. It is the figure shown about the inversion of an image at the time of using a 2nd type lens. It is a flowchart shown about operation | movement of the camera in one Embodiment of this invention. It is a figure which shows the relationship between the kind of interchangeable lens and operation mode in one Embodiment of this invention. It is a figure shown about the interchangeable lens single-lens reflex camera with which one Embodiment of this invention is applied. It is the figure shown about the inversion of an image at the time of using a 2nd type lens in the interchangeable lens single-lens reflex camera.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Interchangeable lens, 101 ... Shooting lens, 102 ... Optical system drive mechanism, 103 ... Aperture mechanism, 104 ... Aperture drive mechanism, 105 ... Lens CPU, 106 ... Communication terminal, 200 ... Camera body, 201 ... Focal plane shutter, 202 DESCRIPTION OF SYMBOLS ... Shutter drive mechanism, 203 ... Dust-proof filter, 204 ... Dust-proof filter drive circuit, 205 ... Various filters, 206 ... Image sensor, 207 ... Image sensor drive circuit, 208 ... Pre-processing circuit, 209 ... Data bus, 210 ... SDRAM control circuit , 211 ... SDRAM, 212 ... image processing circuit, 213 ... video signal output circuit, 214 ... liquid crystal monitor drive circuit, 215 ... liquid crystal monitor in the finder (F), 216 ... rear liquid crystal monitor, 217 ... compression / expansion circuit, 218 ... recording Medium control circuit, 219 ... recording medium, 220 ... sequence controller LA (body CPU), 221... Flash memory control circuit, 222... Flash memory, 223 .. various switches, 224 .. attachment / detachment detection switch, 225... Switch detection circuit, 226. Mirror ... 232 ... focusing screen, 233 ... penta prism, 234 ... eyepiece optical system, 235 ... ranging unit, 1011 ... small diameter wide angle lens, 1012 ... relay optical system

Claims (9)

In cameras with interchangeable photographic lenses,
Imaging means for capturing an image of a subject through the photographing lens and acquiring an image based on the image of the subject;
Discriminating means for discriminating whether the photographing lens is a first type lens or a second type lens;
Image processing means for processing an image acquired by the imaging means;
Comprising
The image processing means reverses the image obtained by the imaging means in the up-down and left-right directions when the determining means determines that the photographing lens is the second type lens, and outputs the image. Features a camera.   It further comprises control means for performing at least one of control for displaying the image output from the image processing means on a display unit and recording the image output from the image processing means on a recording medium. The camera according to claim 1. In cameras with interchangeable photographic lenses,
Imaging means for capturing an image of a subject through the photographing lens and acquiring an image based on the image of the subject;
Discriminating means for discriminating whether the photographing lens is a first type lens or a second type lens;
When the determining means determines that the photographic lens is the second type lens, the image acquired by the imaging means is displayed when the photographic lens is the first type lens. An inverted image processing mode in which an image acquired by the imaging unit is inverted and output, and an image acquired by the imaging unit when the shooting lens is determined to be the first type lens. Image processing means having a standard image processing mode for output without inversion;
Control means for causing the display unit to display an image output from the image processing means;
A camera comprising:   The camera according to claim 3, wherein the display unit includes at least one of a liquid crystal monitor for external display and a liquid crystal monitor for electronic viewfinder display.   5. The camera according to claim 3, wherein the control unit further records the image output from the image processing unit on a recording medium. In cameras with interchangeable photographic lenses,
Imaging means for capturing an image of a subject through the photographing lens and acquiring an image based on the image of the subject;
Discriminating means for discriminating whether the photographing lens is a first type lens or a second type lens;
Display means for displaying an image acquired by the imaging means;
Comprising
The display means displays an image obtained by inverting the top / bottom / left / right of the image acquired by the imaging means when the discrimination means determines that the photographing lens is the second type lens. Camera characterized by.   When the determining means determines that the photographing lens is the second type lens, the sensitivity of the imaging means is greater than when the photographing lens is determined to be the first type lens. The camera according to any one of claims 1 to 6, further comprising sensitivity setting means for setting a higher value.   The camera according to any one of claims 1 to 7, wherein the second type lens includes a lens having a smaller aperture and a wider angle than the first type lens.   2. The determination unit according to claim 1, wherein the information indicating the type of the photographing lens is acquired by communication with the photographing lens, and the determination is performed based on the acquired information indicating the type of the photographing lens. The camera of any one of thru | or 8.

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