WO2020013200A1 - Replacement lens and camera body - Google Patents

Abstract

Provided is a replacement lens that achieves good imaging in a camera body having an imaging element that can be moved to correct blurring. This replacement lens 3 can be attached to and removed from a camera body 1 having an imaging element 11 and comprises: optical systems 31, 32, 33 that form an image of a subject; a storage unit 45 that stores information pertaining to the range of movement for the imaging element 11 which moves in a direction intersecting the optical axes of the optical systems 31, 32, 33; and a transmission unit 46 that sends the information to the camera body.

Description

Interchangeable lens and camera body

The present invention relates to an interchangeable lens, a camera body, and a camera body.

Conventionally, there is a camera body that performs image stabilization by moving an image sensor provided inside the camera body so as to cancel camera shake (see Patent Document 1). When the image pickup device is largely moved, an image deteriorates.

JP 2004-274242 A

An interchangeable lens according to the present invention is an interchangeable lens that can be attached to and detached from a camera body having an image sensor, wherein the optical system forms an image of a subject, and the image sensor moves in a direction intersecting the optical axis of the optical system. And a transmission unit for transmitting the information to the camera body.

Further, the interchangeable lens of the present invention is an interchangeable lens that is detachable from a camera body having an image sensor, and stores an optical system that forms an image of a subject and information indicating a range of the image that is imaged by the image sensor. And a transmission unit that transmits information indicating the range of the image stored in the storage unit to the camera body.

Further, the interchangeable lens of the present invention is an interchangeable lens that can be attached to and detached from a camera body having an image sensor, and an optical system that forms an image of a subject, and an image of the subject that is taken, and an optical axis of the optical system. A configuration is provided that includes a storage unit that stores information used to determine a range of movement of the imaging device that moves in the intersecting direction, and a transmission unit that transmits the information to the camera body.

Further, the camera body of the present invention is a camera body to which an interchangeable lens can be attached and detached, the image pickup device taking an image formed by an optical system of the interchangeable lens, and a shake detection for detecting a shake and outputting a signal. And a control unit that changes a range in which the image sensor is moved when the interchangeable lens to be mounted is different.

It is a block diagram of a camera system of a first embodiment. It is a figure explaining an image circle and a drive permission range of an image sensor, (a) is a state where an image sensor is not driven, and (b) is a state where an image sensor 11 is driven and the center is shifted. is there. FIG. 4 is a diagram for describing information on a driving permission range of an imaging element held by an interchangeable lens. It is a block diagram of a camera system of a second embodiment. FIG. 7 is a diagram for describing information on a driving permission range when a focal length is different in each mode. It is a block diagram of a camera system of a third embodiment.

(1st Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. FIG. 1 is a block diagram of a camera system 100 according to the first embodiment. The camera system 100 includes a camera body 1 and an interchangeable lens 3. In the first embodiment, both the camera body 1 and the interchangeable lens 3 have a shake correction mechanism.
In the present embodiment, a three-dimensional orthogonal coordinate system is set as illustrated. Specifically, when the photographer takes a horizontally long image with the Z axis (in FIG. 1, the direction parallel to the optical axis of the interchangeable lens 3) horizontal, the photographer goes to the left as viewed from the photographer at the position of the camera body 1. The direction is defined as the X plus direction, and the axis perpendicular to the Z axis and the X axis in a plane perpendicular to the Z axis is defined as the Y axis.
A rotation direction about the Z axis is a roll direction, a rotation direction about the Y axis is a yaw direction, and a rotation direction about the X axis is a pitch direction.

(Camera system 100)
The camera system 100 includes a camera body 1 and an interchangeable lens 3 detachably attached to the camera body 1.

(Camera body 1)
The camera body 1 includes an image sensor 11, an element driver 12 for driving the image sensor 11 in the XY plane, an element position detector 13 for detecting the position of the image sensor 11, a recording medium 14, a release switch 15, and a mode setting unit 16. , A display unit 17, a blur detection sensor 18, a body-side transmitting / receiving unit 19 for communication with the interchangeable lens 3, and a body CPU 20.

The body CPU 20 includes a photographing control unit 21 that controls photographing by the image sensor 11, an image signal processing unit 22 that processes image data photographed by the image sensor 11, and focuses on image data captured by the image sensor 11. A focus detection unit 23 for detecting a state.
Further, the body CPU 20 includes a sensor signal processing unit 24 that processes a signal of the shake detection sensor 18, a target position calculation unit 25 that calculates a target position of the image sensor 11 from the shake signal processed by the sensor signal processing unit 24, An element drive amount calculation unit that calculates a drive amount of the image sensor within a drive permission range, which will be described later, based on the target position calculated by the target position calculation unit.

The release switch 15 is a member for performing a photographing operation of the camera system 100, and is a switch for a photographer to operate a photographing operation timing and the like.

(4) The photographing control unit 21 controls photographing of the image sensor 11 by pressing the release switch 15. The release switch 15 can be depressed by half-pressing the release switch 15 halfway down or full-pressing down to the end. The camera system 100 performs a focusing operation by half-pressing and performs a shooting operation by full-pressing. The focus operation and the photographing operation may be performed by a single operation without half-press and full-press.

The mode setting unit 16 is an operation unit operated by a photographer, and can select any one of a still image shooting mode and a moving image shooting mode.
Further, the mode setting unit 16 can select any one of three drive modes in which drive control at the time of blur correction of the image sensor 11 described later is different. The three drive modes are a "normal mode", an "active mode", and a "sports mode".

“Normal mode” is a drive mode for performing a normal type of shake correction that can be used for normal use. In particular, it is suitable when the photographer takes a picture while standing still (stops and takes a picture). “Pre-exposure centering” of the image sensor 11 described later is performed at the time of shooting. In the “normal mode”, a range in which the image sensor 11 moves to correct blur (referred to as an “element blur correction range”) is set to “large”. Can be moved over a wider range than when is set.

The “active mode” is a drive mode for performing shake correction suitable for shooting while walking, riding a vehicle, and the like. The “active mode” is suitable when the photographer moves (takes a picture without stopping) without standing still. At the time of shooting, "pre-exposure centering" is performed as in the "normal mode". Also in the “active mode”, the element shake correction range in which the image sensor 11 moves to correct the shake is set to “large”.

The “sports mode” is a drive mode that performs optimal camera shake correction when, for example, following a moving subject. The “sports mode” is suitable for shooting a subject during sports. In the "sport mode", unlike the "normal mode" and the "active mode", the "pre-exposure centering" is not performed. In the “sports mode”, the element blur correction range in which the image sensor 11 moves to correct blur is set to “small”, and the image sensor 11 is set to “normal mode” or “active mode” during blur correction. You can move only a narrower area than you can.

“Pre-exposure centering” means moving the center of the image sensor 11 to the center of a drive permission range R2 described later immediately before the exposure of the image sensor 11 that generates a recorded image based on the operation of the release switch 15. Further, in addition to immediately before the exposure for generating the recorded image, when there is an instruction from the photographer, such as at the start of a live view, the image sensor 11 that is moving for blur correction is moved to the center of the drive permission range R2. It is possible to move. The centering is to move the center of the image sensor 11 to the center of the drive permission range R2, thereby eliminating the deviation of the movable distance of the image sensor 11 in the XY plane, and enabling blur correction for blur in all directions. It is. When the release switch 15 is half-pressed to full-pressed, the center of the image sensor 11 is moved to the center of the drive permission range R2, and movement for blur correction is performed therefrom.

The reason why "centering before exposure" is not performed in the "sports mode" is that, during continuous shooting, it is better to return the image sensor 11 to the center than to return the image sensor 11 to the center each time shooting is performed. This is because an image based on the obtained signal is continuously displayed on the display unit 17 and an image for confirming a subject and performing framing is more stable, and framing is easily performed. When “pre-exposure centering” is performed, the position of the subject to be photographed in the image is shifted. In the case of shooting a still image or shooting a moving image in sports shooting, framing is easy if the live view image is stable.

The imaging element 11 is provided on a planned focal plane of a photographic optical system of the interchangeable lens 3, and photoelectrically converts light from a subject incident through the photographic optical system of the interchangeable lens 3 under the control of the photographic control unit 21. Generate and output signals. The imaging device 11 is configured by, for example, a CCD, a CMOS, or the like. Further, the image sensor 11 has pixels for focus detection.

(4) The image signal processing unit 22 performs processing such as noise processing and A / D conversion on the signal output from the image sensor 11 to generate image data. The image signal processing unit 22 creates image data for a still image (or a live view image) when still image shooting is selected by the mode setting unit 16, and generates an image for a moving image when moving image shooting is selected. Create data.

The recording medium 14 is a medium for recording the still or moving image data created by the image signal processing unit 22, and uses a card memory. The built-in memory may be used.

The display unit 17 is provided on the rear surface of the camera body 1 and includes information (menu) related to a subject image (still image, moving image including live view image) based on the image data created by the image signal processing unit 22 and operation. Is a display that displays. A liquid crystal display or an organic EL display is used.

The focus detection unit 23 performs focus detection processing using a focus detection pixel of the image sensor 11 by a well-known pupil division type phase difference method. Alternatively, focus detection may be performed by a well-known contrast method using image data output from the image sensor 11.

The blur detection sensor 18 is arranged inside the camera body 1 and detects a blur applied to the camera body 1 such as a camera shake of a photographer. In the present embodiment, the shake detection sensor 18 includes an angular velocity sensor that detects rotational shake such as pitching, yawing, and rolling, and an acceleration sensor that detects translational shake.
The angular velocity of the rotational vibration (pitching) about the X axis, the angular velocity of the rotational vibration (yawing) about the Y axis, the angular velocity of the rotational vibration (rolling) about the Z axis, and the XY Translation blur in the plane is detected. In the present embodiment, it is only necessary that the angular velocity of the translational shake in the XY plane and the rotational shake (rolling) about the Z axis be at least possible.

The sensor signal processing unit 24 reads the output signal of the shake detection sensor 18, calculates a reference value based on the output signal, and performs various processes such as subtracting the reference value from the output signal.

The target position calculation unit 25 calculates a target position for moving the image sensor 11 to correct the camera body 1 shake from the output signal of the shake detection sensor 18 processed by the sensor signal processing unit 24. The target position is determined by the valid pixel range of the image sensor 11 (the range in which pixels for generating image data of a still image are arranged) when the drive permission received from the interchangeable lens 3 by the body-side transmitting / receiving unit 19 described later. The position is set so as not to protrude from the range.
In the present embodiment, the camera shake corrected by the camera body 1 is the translational shake in the XY directions detected by the shake detection sensor 18 and the rotational shake in the roll direction among the camera body 1 shakes.

The element driving amount calculation unit 26 is an imaging element for driving the imaging element 11 from the target position of the imaging element 11 detected by the target position calculation unit 25 and the position of the imaging element 11 detected by the element position detection unit 13. 11 is calculated.

The element driving unit 12 moves the image sensor 11 in the XY direction and the roll direction by the driving amount calculated by the element driving amount calculation unit 26. Thereby, the blur applied to the camera body 1 is corrected, and a subject image without blur is captured.
When the driving mode selected by the mode setting unit 16 of the camera body 1 is the normal mode or the active mode, the element driving unit 12 performs pre-exposure centering of the imaging element 11 and sets the selected driving mode to the sports mode. In the case of, the pre-exposure centering of the image sensor 11 is not performed.

(4) The image sensor 11 is provided with an element position detector 13 for detecting the position of the image sensor 11. In the present embodiment, the element position detection unit 13 is, for example, a Hall element and a magnet, but is not limited thereto, and may be a detection unit combining a light emitting unit and a light receiving unit (PSD).

When the interchangeable lens 3 is mounted on the camera body 1, the body-side transmitting / receiving section 19 comes into contact with the lens-side transmitting / receiving section 46. Thus, signals can be transmitted and received between the camera body 1 and the interchangeable lens 3, and information is exchanged between the camera body 1 and the interchangeable lens 3.
The body-side transmission / reception unit 19 receives at least drive permission range information of the image sensor 11 from the lens-side transmission / reception unit 46.
Further, the body-side transmitting / receiving section 19 transmits the defocus amount detected by the focus detecting section 23 and the drive mode information selected by the mode setting section 16 to the lens-side transmitting / receiving section 46 in order to drive the focus lens. I do.

(Interchangeable lens 3)
Next, the interchangeable lens 3 will be described. The interchangeable lens 3 includes a zoom lens 31, a focus lens 32, a blur correction lens 33, a zoom lens driving unit 51, a focus lens driving unit 52, a blur correction lens driving unit 53, and a zoom lens position detecting unit 41. , A focus lens position detector 42 and a blur correction lens position detector 43.
The interchangeable lens 3 further includes an angular velocity sensor 44, a lens storage unit 45, a lens CPU 30, and a lens-side transmitting / receiving unit 46.

As described above, when the interchangeable lens 3 is mounted on the camera body 1, the lens-side transmitting / receiving unit 46 comes into contact with the body-side transmitting / receiving unit 19, so that signals can be transmitted and received between the camera body 1 and the interchangeable lens 3. .
The lens-side transmitting / receiving unit 46 receives the defocus amount and the drive mode information from the body-side transmitting / receiving unit 19. Further, the lens-side transmitting / receiving section 46 transmits the drive permission range information to the body-side transmitting / receiving section 19.

The lens CPU 30 includes an angular velocity signal processing unit 34, a shake correction lens target position calculation unit 35, a lens drive amount calculation unit 36, and an element drive permission range information creation unit 37.

The zoom lens 31 is a lens group that is driven by, for example, a zoom lens driving unit 51 that is a zoom ring, and that changes the focal length of the interchangeable lens 3 by moving along the optical axis direction.
Note that the zoom lens driving unit 51 may be a motor that detects rotation of the zoom ring or the like and drives the lens based on a signal from the lens CPU 30. Further, the zooming operation is not limited to the zoom ring, and may be a zooming operation by a button operation or the like.
The zoom lens position detector 41 detects the position of the zoom lens 31.

The focus lens 32 is a lens group that is driven by the focus lens drive unit 52 and moves in the optical axis direction to focus a subject image on the imaging surface of the imaging element 11. The focus lens driving section 52 includes a driving source such as a stepping motor.
The defocus amount (the amount of deviation between the position of the subject image and the imaging surface of the imaging element 11) detected by the focus detection unit 23 based on a signal output from the focus detection pixel of the imaging element 11 is transmitted from the body-side transmission / reception unit 19. The data is transmitted to the lens side transmitting / receiving unit 46. The lens drive amount calculation unit 36 calculates the drive direction and the drive amount of the focus lens 32 from the received defocus amount. The focus lens drive unit 52 drives the focus lens 32 in the calculated drive direction and drive amount. The focus lens position detector 42 detects the position of the focus lens.

The blur correction lens 33 is a lens group that is driven to optically correct blur by a blur correction lens driving unit 53 such as a VCM (voice coil motor) and is movable on an XY plane.
The shake correction lens 33 is a shake correction lens based on the angular velocity detected by the angular velocity sensor 44, the drive amount calculated by the angular velocity signal processing unit 34, the shake correction lens target position calculation unit 35, and the lens drive amount calculation unit 36. The drive unit 54 is driven to correct the pitch and yaw blurs.
The position of the shake correction lens 33 is detected by the shake correction lens position detection unit 43, and the detected position information is fed back to the output of the shake correction lens target position calculation unit 35.

The angular velocity sensor 44 is a sensor that detects an angular velocity of a shake generated in the interchangeable lens 3. It is a sensor such as a vibrating gyroscope that detects angular velocities around the X axis (pitch) and around the Y axis (yaw). Note that the angular velocity sensor 44 may also detect the angular velocity around the Z axis (roll).

The lens storage unit 45 stores information about the size of the image circle (the area where the subject image is formed at the in-focus position) corresponding to the focal length. This information is information unique to the interchangeable lens, and differs for each interchangeable lens. The lens storage unit 45 also stores information relating to an area (referred to as a “permitted driving range”) in which the optical performance is within a permissible range in a moving image photographed image and a still image photographed image in the image circle.

The lens CPU 30 includes an angular velocity signal processing unit 34, a shake correction lens target position calculation unit 35, a lens drive amount calculation unit 36, and an element drive permission range information creation unit 37.

The angular velocity signal processing section 34 reads an output signal of the output of the angular velocity sensor 44, calculates a reference value based on the signal, and performs various processes such as subtracting the reference value from the output signal.

The shake correction lens target position calculation unit 35 calculates the target position of the shake correction lens 33 from the output of the angular velocity sensor 44 processed by the angular velocity signal processing unit 34.

The lens drive amount calculation unit 36 calculates a blur correction lens drive unit 53 from the target position calculated by the shake correction lens target position calculation unit 35 and the current position of the shake correction lens 33 detected by the shake correction lens position detection unit 43. Is calculated.

The shake correction lens driving unit 53 drives the shake correction lens 33 based on the calculated drive amount of the shake correction lens 33.

When the shake correction lens 33 is driven, the shake correction lens position detection unit 43 detects the movement position of the shake correction lens 33 and feeds it back to the lens drive amount calculation unit 36. The lens drive amount calculation unit 36 recalculates the drive amount of the shake correction lens 33 based on the feedback signal.

The lens storage unit 45 stores information on the focal length of the interchangeable lens 3 corresponding to the position of the zoom lens, a shooting mode (still image shooting mode, moving image shooting mode) and a driving mode (normal mode, active mode, sports mode) according to the focal length. ) Stores the drive permission range of the image sensor 11 for each element blur correction range determined by the above.

Next, the drive permission range transmitted from the interchangeable lens 3 to the camera body 1 will be described. The element drive permission range information creating unit 37 acquires the focal length information of the interchangeable lens 3 corresponding to the position of the zoom lens stored in the lens storage unit 45 from the position of the zoom lens sent from the zoom lens position detecting unit 41. I do. Based on this focal length information, the drive permission range of the image sensor 11 stored in the lens storage unit 45 is read, and information on the drive permission range to be transmitted to the camera body is created. Send to camera body 1. The interchangeable lens 3 transmits, to the camera body 1, information on the shooting mode at the focal length of the interchangeable lens 3 corresponding to the position of the zoom lens and the drive permission range for each element blur correction range. The camera body 1 selects a corresponding drive permission range from the received drive permission range information based on the element shake correction range determined from the shooting mode and the drive mode set by the mode setting unit 16 of the camera body 1. And set.

Also, the lens storage unit 45 may store, as a two-dimensional table, the photographing mode and the drive permission range of the image sensor 11 for each element blur correction range according to the focal length and the photographing distance. In this case, the element drive permission range information creating unit 37 calculates the focal length of the interchangeable lens 3 corresponding to the zoom lens position stored in the lens storage unit 45 from the zoom lens position sent from the zoom lens position detection unit 41. Get information. Based on the focal length information and the photographing distance information calculated from the lens position sent from the focus lens position detecting unit 42, the photographing for each photographing mode and element blur correction range stored in the table of the lens storage unit 45 is performed. The drive permission range of the element 11 is read to create information to be transmitted to the camera body.

FIG. 2 is a diagram for explaining the image circle R1 and the driving permission range R2 of the image sensor 11. The image circle R1 is a range in which light from a subject that has passed through the interchangeable lens 3 forms an image on an imaging surface. The image circle R1 is constant regardless of the position of the shake correction lens 33. The drive permission range R2 is a range that satisfies the required performance such as resolution, various aberrations, and vignetting within the image circle R1. When the shake correction lens 33 moves for shake correction, the position or range of the drive permission range R2 changes according to the position of the shake correction lens 33.

FIG. 2 shows the drive permission range R2 when the center of the shake correction lens 33 is at the center of the optical axis of the interchangeable lens 3. A change in the position or range of the drive permission range R2 means that the shape of the drive permission range R2 is distorted from a circle, becomes smaller, or the center position is shifted. A region R3 in FIG. 2 is an effective pixel region of the image sensor 11.

FIG. 2A shows a state in which the image sensor 11 and the blur correction lens 33 are not driven, the center C3 of the effective pixel region R3 of the image sensor 11, the image circle R1 formed by the interchangeable lens 3, and the drive permission range. It is coincident with the center C2 of R2.

The above-mentioned pre-exposure centering is to match C2 and C3 before exposure as shown in FIG. 2A. When the center of the image circle R1 and the center of the drive permission range R2 are shifted (for example, when the center of the blur correction lens 33 does not coincide with the center of the optical axis of the interchangeable lens 3), the image sensor is used as pre-exposure centering. The center of the image circle R1 may be matched with the center of the image circle R1, or the center of the image sensor 11 may be matched with the center of the drive permission range R2.

FIG. 2B shows a state in which the image sensor 11 is driven. As shown, when the image sensor 11 is driven and a part of the effective pixel region R3 of the image sensor 11 protrudes from the image circle R1, the protruding region A1 does not sufficiently receive light, so that a dark image is formed. Is done. Further, when the effective pixel region R3 of the image sensor 11 extends beyond the drive permission range R2, the image of the extended region A2 deteriorates. For example, various aberrations are worse than the drive permission range R2.

The drive permission range R2 differs for each interchangeable lens 3, and also for each interchangeable lens 3 depending on the focal length and the shooting distance.
As described above, the drive permission range R2 is stored in the lens storage unit 45. Note that the driving permission range R2 may be calculated each time from the focal length and the shooting distance without storing the data in the lens storage unit 45.

Next, the operation of the camera system 100 of the present embodiment will be described.
The interchangeable lens 3 is mounted on the camera body 1 and a main switch (power switch) (not shown) of the camera body 1 is turned on.

When the release switch 15 is half-pressed or the moving image shooting (including a live view image) is selected by the mode setting unit 16, the image data acquired by the light from the subject incident on the imaging surface of the imaging device 11 is used as a basis. Next, the focus detection unit 23 detects the defocus amount.

The defocus amount is transmitted from the body-side transmitting / receiving section 19 to the lens-side transmitting / receiving section 46. Based on the received defocus amount, the interchangeable lens 3 lens drive amount calculation unit 36 determines the drive direction and drive amount of the focus lens 32, and the focus lens drive unit 52 drives the focus lens 32 based on the drive direction and drive amount. .
The position of the focus lens 32 after driving is detected by the focus lens position detection unit 42. The photographing distance information obtained from the position of the focus lens 32 may be input to the element drive permission range information creating unit 37.
The body may calculate the moving amount and the driving direction of the focus lens 32 from the detected defocus amount, and may transmit information on the moving amount and the driving direction of the focus lens 32 to the interchangeable lens 3.

Further, the position of the zoom lens 31 is detected by the zoom lens position detection unit 41, and focal length information corresponding to the position of the zoom lens 31 stored in the lens storage unit 45 is transmitted to the element drive permission range information creation unit 37. Is done.

The lens storage unit 45 stores two types of information for the moving image shooting mode and for the still image shooting mode as the drive permission range of the image sensor 11 for each focal length, and each of the information further includes an element shake correction range of “ In the case of "large", there are two different types of information in the case of "small". That is,
(A) The element blur correction range is “large” in moving image shooting.
(B) The element shake correction range is “large” in still image shooting.
(C) The element shake correction range is “small” in moving image shooting.
(D) The element blur correction range is “small” in still image shooting.
The drive permission range information in the above four cases is stored in the lens storage unit 45.
FIG. 3 is a table showing the drive permission ranges R2 at the time of photographing of the four types (a) to (d) with respect to three types of focal lengths A, B, and C (focal lengths are A>B> C). Shown in The vertical items in FIG. 3 show four types of cases (a) to (d), the horizontal items show the focal length, and (1) to (6) show driving permission under the above conditions. The shape and size of the range R2 are shown.
The shape of the drive permission range R2 is a shape such as a circle, a square, and a hexagon. In the case of a circle, the size of the drive permission range R2 is the distance from the center of the circle to the circumference (the length of the radius), and in the case of a square, the length of the perpendicular from the center of the square to one side (the length of one side) ), And indicates the length from the center of the drive permission range R2 to the periphery (edge) of the drive permission range R2. For example, the information of (1) has a circular shape and a size of 20 mm. The size of the drive permission range R2 is (1) ≧ (2) ≧ (3) ≧ (4) ≧ (5) ≧ (6).

However, (1) to (6) are merely examples, and FIG. 3A shows (a) the drive permission range R2 when the element blurring correction range is “large” in moving image shooting, (2) and (b). The drive permission range R2 when the element shake correction range is “large” in still image shooting is the same (2), but the drive permission range R2 may be different between the two. Further, the plurality of drive permission ranges R2 of (1) to (6) may be the same.
Note that a table corresponding to the drive mode may be used instead of the element shake correction range.

In the case of shooting a moving image, a decrease in peripheral resolution as optical performance is more tolerated than that of a still image. Therefore, as shown in the table of FIG. Large range (when focal length is the same).
When the element blur correction range is “large”, the drive permission range R2 is large. When the element blur correction range is “small”, the drive permission range is larger than when the element blur correction range is “large”. The size of the range R2 becomes smaller.

Based on the position of the zoom lens 31 detected by the zoom lens position detection unit 41, the element drive permission range information creation unit 37 selects information to be sent to the camera body from the table (FIG. 3) of the lens storage unit 45, create.
That is, the focal length corresponding to the position of the zoom lens 31 stored in the lens storage unit 45 is read, and information on the drive permission range R2 in the cases (a) to (d) corresponding to the focal length is extracted. For example, when the focal length is A in FIG. 3, information (1) to (4) is extracted as information to be transmitted to the camera body 1.

The lens-side transmission / reception unit 46 transmits the information on the drive permission range R2 created by the element drive permission range information creation unit 37 ((1) to (4) when the focal length is A) to the body-side transmission / reception unit 19. I do. In addition, not only information on the drive permission range R2 of the element but also focal length information, photographing distance information, and aperture value information may be sent together.
The communication between the lens-side transmitting / receiving unit 46 and the body-side transmitting / receiving unit 19 is performed at regular intervals (for example, at 1 ms intervals).

In the camera body 1, one of “still image shooting mode” or “moving image shooting mode” which is shooting mode information set by the mode setting unit 16, and “normal mode”, “active mode” or “active mode” which is driving mode information Based on any of the setting information of the "sports mode", information on the drive permission range R2 received from the interchangeable lens 3 is selected. Note that, as described above, the element shake correction range is determined by the drive mode.

For example, when the “active mode” is set by the mode setting unit 16, the element shake correction range is “large”, and when the “moving image shooting mode” is further set, the case of FIG. And the information (1) (shape and size of the drive permission range R2) is selected.

In the camera body 1, when a blur is detected by the blur detection sensor 18, the sensor signal processing unit 24 reads a signal output from the blur detection sensor 18, calculates a reference value for blur detection based on the signal, and Various processes such as subtraction of a reference value for blur detection calculated from a signal output from the detection sensor 18 are performed.

The target position calculation unit 25 detects the shake of the camera body 1 based on the output signal of the shake detection sensor 18 processed by the sensor signal processing unit 24 and the information on the selected drive permission range R2 received from the lens side transmission / reception unit. The target position of the image sensor 11 for correction is calculated.
Since the target position calculation unit 25 calculates the target position from the information on the selected drive permission range R2 and the output of the blur detection sensor 18, at least a part of the effective pixel region R3 of the image sensor 11 is moved from the drive permission range R2. The target position can be limited such that the entire effective pixel region R3 of the image sensor 11 is inside the driving permission range R2 without moving to the outside.

The element driving amount calculating section 26 drives the imaging element 11 based on the target position of the imaging element 11 calculated by the target position calculating section 25 and the position of the imaging element 11 detected by the element position detecting section 13. The driving amount of the image sensor 11 is calculated.

(4) The element driving unit 12 drives the imaging element 11 by the calculated driving amount. Therefore, the effective pixel region R3 of the image sensor 11 does not protrude from the drive permission range R2. Therefore, the photographed image is not photographed in a region where the optical performance is not good, so that the image does not deteriorate. Further, since the drive permission range R2 is inside the image circle R1, the image is not darkened by being taken outside the image circle.

In the present embodiment, the lens storage unit 45 stores one type of information (table) of the drive permission range R2 irrespective of whether or not the shake correction of the interchangeable lens 3 is performed by the shake correction lens 33. The present invention is not limited to this, and information (table) of a different drive permission range R2 may be stored depending on whether or not the blur correction by the blur correction lens 33 is performed. In this case, the element drive permission range information creating unit 37 selects information to be sent to the camera body depending on whether or not the blur correction by the blur correction lens 33 is performed.

Note that information indicating whether the drive mode selected by the mode setting unit 16 of the camera body 1 is a normal mode, an active mode, or a sports mode may be transmitted to the lens-side transmitting / receiving unit 46. The interchangeable lens 3 may determine “large” or “small” of the element blur correction range from the received drive mode information, and may select information on the drive permission range R2 to be sent to the camera body.
For example, if the received drive mode is the “normal mode”, it is determined that the element blur correction range is “large”, and if the focal length is A, the information of (1) or (3) in FIG. Send to body.

Furthermore, information on the shooting mode may be received from the camera body 1. "Movie shooting mode" is received as the shooting mode, and "Normal mode" is received as the driving mode. If the focal length is A, only the information of (1) is transmitted to the camera body 1. In this case, driving is permitted by the camera body. There is no need to select information in the range R2.

When the shake correction lens of the interchangeable lens 3 is driven for shake correction, similarly to the case of the imaging device 11, when the drive mode received by the interchangeable lens 3 is the normal mode or the active mode, the shake correction lens 33 is used. Is performed, and if the selected drive mode is the sports mode, the pre-exposure centering of the blur correction lens 33 is not performed.
When the shake correction lens of the interchangeable lens 3 is driven for shake correction, positional information on the shake correction lens and information on the “maximum movement range of the shake correction lens” that is the maximum movement range of the shake correction lens 33 are sent to the camera body 1. It does not matter. The camera body 1 calculates a drive amount for driving the image sensor 11 for blur correction based on the position information of the blur correction lens and the information on the maximum movement range of the blur correction lens sent from the interchangeable lens 3.

(2nd Embodiment)
Next, a second embodiment will be described. FIG. 4 is a block diagram of a camera system 200 according to the second embodiment. The camera system 200 and the interchangeable lens 203 of the second embodiment are different from the camera system 2 and the interchangeable lens 3 of the first embodiment in that the interchangeable lens 203 does not include a blur correction lens and a mechanism for driving the blur correction lens. is there.

In the present embodiment, the camera body 201 corrects translational shake in the XY directions and rotational shakes in the pitch, yaw, and roll directions. In the following description, portions of the camera system 200 and the interchangeable lens 203 that are the same as those of the camera system 100 and the interchangeable lens 3 of the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the present embodiment, in the element driving permission range information creating unit 37,
Information on the element drive permissible range R2 for each shooting distance in each of the (a) moving image shooting mode and (b) the still image shooting mode is created. It should be noted that the conditions of the element blur correction range of “large” and “small” may be added to create information of the four drive permission ranges R2 as in the first embodiment.

As shown in FIG. 5, in each of the “moving image shooting mode” and the “still image shooting mode”, information on the drive permission range R2 for the focal lengths A, B, and C (A> B> C) is generated. Then, information of the drive permission range R2 corresponding to the focal length of the interchangeable lens 203 is transmitted to the camera body 201.

Information on whether the moving image shooting mode or the still image shooting mode is selected is input from the mode setting unit 16 to the element driving amount calculation unit 26 of the camera body 201. From the information (a) and (b) received from the interchangeable lens 203, one of moving image shooting and still image shooting is selected, and information on the drive permission range R2 is selected. Based on the information on the selected drive permission range R2, the element drive amount calculation unit 26 of the camera body 201 calculates the drive amount for driving the image sensor 11 as in the first embodiment.
When the element blur correction range has a condition of “large” or “small”, the drive mode is also taken into consideration (by selecting the element blur correction range from the set drive mode), the drive permission range R2 is selected. Select information.

も In the second embodiment, similarly to the first embodiment, the element driving unit 12 drives the imaging element 11 by the calculated driving amount. Therefore, the effective pixel region R3 of the image sensor 11 does not protrude from the drive permission range R2. Therefore, the photographed image is not photographed in a region where the optical performance is not good, so that the image does not deteriorate. Further, since the drive permission range R2 is inside the image circle R1, the image is not darkened by being taken outside the image circle.

(Third embodiment)
Next, a third embodiment will be described. FIG. 6 is a block diagram of a camera system 300 according to the third embodiment. The camera system 300 and the interchangeable lens 303 of the third embodiment are different from the camera system 100 and the interchangeable lens 3 of the first embodiment in that they do not include an element drive permission range information creating unit. In the following description, portions of the camera system 300 and the interchangeable lens 303 that are the same as those of the camera system 100 and the interchangeable lens 3 of the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

In the case of the interchangeable lens 303 that does not include the element drive permission range information creating unit, the lens-side transmitting / receiving unit 46 transmits the focal length information to the body-side transmitting / receiving unit 19. In addition, the individual information of the interchangeable lens 303 stored in the lens storage unit 45 is also transmitted.

(4) The element driving amount calculation unit 26 of the camera body 301 inputs information on whether the moving image shooting or the still image shooting is selected from the mode setting unit 16. Further, information on which of the normal mode, the active mode, and the sports mode is selected is input from the mode setting unit 16. The element drive amount calculation unit 26 determines the drive permission range R2 of the image sensor 11 based on the focal length information received from the interchangeable lens 3 and the individual information of the interchangeable lens 303.

In this case, the shorter the focal length, the smaller the drive permission range R2, and the longer the focal length, the larger the drive permission range R2. The reason is that when the focal length of the lens is short, the aberration and the light amount change with respect to the change in the image height are large as compared with the case where the focal length is long, and the driving permission range of the image sensor for correcting the same amount of blur is larger. This is because the shorter the focal length, the smaller the focal length and the longer the focal length, the larger the focal length.
The shooting distance information may be transmitted from the interchangeable lens 303 to the camera body 301. The element drive amount calculation unit 26 may calculate the drive permission range of the image sensor 11 based on the photographing magnification calculated using the received photographing distance information of the interchangeable lens 3.

In the third embodiment as well, as in the first embodiment, the element driving unit 12 drives the imaging element 11 by the calculated driving amount. Therefore, the effective pixel region R3 of the image sensor 11 does not protrude from the drive permission range R2. Therefore, the photographed image is not photographed in a region where the optical performance is not good, so that the image does not deteriorate. Further, since the drive permission range R2 is inside the image circle R1, the image is not darkened by being taken outside the image circle.

In the above embodiment, the drive permission range R2 of the image sensor 11 is circular, but the drive permission range R2 stored in the lens storage unit 45 may not be circular. For example, the lens storage unit 45 stores, as the information of the driving permission range R2 of the imaging element 11, the shorter of the driving permission range of the imaging element 11 in the long side direction and the driving permission range of the imaging element 11 in the short side direction. May be stored as the drive permission range R2 as a square having one side as the drive permission range. The shape information of the drive permission range R2 may be rectangular or elliptical. The lens-side transmission unit 46 transmits the drive permission range and the shape information to the camera body.

In the above embodiment, translation blur and rotation blur are detected and blur correction is performed. However, only one of translation blur and rotation blur may be detected and blur correction may be performed.

In the above-described embodiment, different drive control is performed for pre-exposure centering of the image sensor 11 by operating the release switch 15 according to the drive mode (normal mode, active mode, sports mode). The difference is not limited to this, and the drive amount of the image sensor 11 may be controlled with a different magnitude for the shake detection signal of the same magnitude.

In the above-described embodiment, a plurality of drive modes and a plurality of shooting modes can be set. However, only one of the plurality of modes may be provided. In that case, the lens storage unit 45 stores information on the drive permission range R2 of one image sensor 11 for each focal length.
Further, in the above embodiment, a plurality of drive modes and a plurality of photographing modes can be set, and the drive permission range R2 of the image sensor 11 is different for each of the plurality of modes. The drive permission range R2 of the image sensor 11 may be the same value. In that case, the lens storage unit 45 may store information on the drive permission range R2 of one image sensor 11 for each focal length.

Also, in the above embodiment, the information detected by the zoom lens position detection unit 41 is the information on the position of the zoom lens, but may be the value of the focal length of the interchangeable lens 3. Further, the lens storage unit 45 may store the drive permission range R2 for each of a plurality of focal lengths longer than the three types of focal lengths, or may store the drive permission range R2 for each of a plurality of positions of the zoom lens. You may memorize it.

The lens storage unit 45 may hold information on the drive permission range R2 corresponding to the focal length and the shooting distance of the zoom lens. This is because when the shooting magnification increases, the change in the drive permission range R2 increases according to the shooting distance. In this case, a plurality of drive permission range information corresponding to each shooting mode may be stored in a two-dimensional table of the focal length and the shooting distance.

(4) The lens storage unit 45 may hold the information on the drive permission range R2 as a function formula relating to at least one of the focal length and the photographing distance.

The setting of the drive mode may be performed by the operation unit provided in the interchangeable lens 3. In that case, the interchangeable lens 3 may transmit the drive mode set by the operation unit from the interchangeable lens to the camera body.

Also, when an interchangeable lens without a CPU or a mount adapter that cannot communicate with the interchangeable lens is attached, the target position setting unit of the camera body sets the target position setting unit based on the focal length information set by the user from the menu. The drive permission range R2 may be determined, and the target position may be calculated.

Although the present invention has been described using the embodiments, the technical scope of the present invention is not limited to the above embodiments. It is apparent to those skilled in the art that various changes or improvements can be made to the above embodiment. It is apparent from the description of the appended claims that the form in which such changes or improvements are made and the form of the combination of the elements of the embodiment and the elements of the modification are also included in the technical scope of the present invention.

1, 201, 301: camera body, 3, 203, 303: interchangeable lens, 11: imaging element, 12: element driving section, 13: element position detecting section, 14: recording medium, 15: release switch, 16: mode setting Unit, 17: display unit, 18: blur detection sensor, 19: body side transmission / reception unit, 20: body CPU, 21: shooting control unit, 22: image signal processing unit, 23: focus detection unit, 24: sensor signal processing unit , 25: target position calculation unit, 26: element drive amount calculation unit, 30: lens CPU, 31: zoom lens, 32: focus lens, 33: shake correction lens, 34: angular velocity signal processing unit, 35: shake correction lens target Position calculation unit, 36: shake correction lens drive amount calculation unit, 37: element drive permission range information creation unit, 41: zoom lens position detection unit, 42: focus lens position detection , 43: blur correction lens position detection unit, 44: angular velocity sensor, 45: lens storage unit, 46: lens side transmission / reception unit, 51: zoom lens drive unit, 52: focus lens drive unit, 53: blur correction lens drive unit, 54: blur correction lens driving unit, 56: lens side transmitting / receiving unit, 100, 200, 300: camera system

Claims (14)

An interchangeable lens that can be attached to and detached from a camera body having an image sensor,
An optical system that forms an image of the subject;
A storage unit that stores information about a range of movement of the imaging device that moves in a direction that intersects with the optical axis of the optical system,
A transmission unit for transmitting the information to the camera body. An interchangeable lens that can be attached to and detached from a camera body having an image sensor,
An optical system that forms an image of the subject;
A storage unit that stores information indicating a range of the image captured by the image sensor,
A transmission unit that transmits information indicating the range of the image stored in the storage unit to the camera body. The optical system, the focal length can be changed by moving the lens of the optical system in the optical axis direction of the optical system,
The storage unit stores information relating to a range of movement of the image sensor for each of a plurality of focal lengths of the optical system or information indicating a range of the image captured by the image sensor,
The said transmission part transmits to the said camera body the information regarding the movement range of the said image pick-up element corresponding to the focal length of the said optical system, or the information which shows the range of the said image picked up by the said image pick-up element to the said camera body. The interchangeable lens described in 1. The interchangeable lens according to claim 2, wherein the information indicating the range of the image is information of a range in which the imaging element moves in a plane intersecting with an optical axis of the optical system to capture the image. The transmitting unit transmits the information at regular time intervals,
The interchangeable lens according to claim 1. The storage unit stores first information indicating a first range and second information that includes the first range and is wider than the first range, as the information regarding the range of the movement or the information indicating the range of the image. And second information to be stored,
The transmitting unit transmits at least one of the first information and the second information,
The interchangeable lens according to claim 1. The storage unit stores first information indicating a first range and second information indicating a second range, as information regarding the range of the movement or information indicating a range of the image,
The first range is set to a range in which the performance of the outermost optical system in the first range is better than the performance of the outermost optical system in the second range,
The transmitting unit transmits at least one of the first information and the second information,
The interchangeable lens according to claim 1. An interchangeable lens that can be attached to and detached from a camera body having an image sensor,
An optical system that forms an image of the subject;
A storage unit that captures an image of the subject and stores information used to determine a range of movement of the image sensor that moves in a direction that intersects with the optical axis of the optical system.
A transmission unit for transmitting the information to the camera body. The optical system, the focal length can be changed by moving the lens of the optical system in the optical axis direction of the optical system,
The storage unit stores information used to determine a range of movement of the imaging device for each of a plurality of focal lengths of the optical system,
The interchangeable lens according to claim 8, wherein the transmitting unit transmits the information to the camera body. A camera body with removable interchangeable lenses,
An imaging element for capturing an image formed by the optical system of the interchangeable lens;
A shake detection unit that detects a shake and outputs a signal,
When the interchangeable lens to be mounted is different, a control unit that changes the range in which the image sensor is moved,
Camera body with. 11. The camera body according to claim 10, wherein the control unit receives information that determines a range in which the image sensor is moved or information about a range of movement of the image sensor from the interchangeable lens, and determines the range. The information that determines a range in which the image sensor is moved or information about a range of movement of the image sensor is information that indicates a movable range of the image sensor in order to correct blurring of the image based on the shake. Item 12. The camera body according to item 10 or 11. A setting unit for setting a plurality of shooting modes,
The camera body according to any one of claims 10 to 12, wherein a range in which the image sensor is moved is changed depending on the shooting mode set by the setting unit. It has a setting unit to set video shooting and still image shooting,
The information that determines the range in which the image is moved or the information about the range of movement of the image sensor includes information about a first range and information about a second range that includes the first range and is wider than the first range. Consisting of
The controller moves the image sensor within a range based on the range of 1 when still image shooting is set, and is based on first information indicating the first range when moving image shooting is set. The camera body according to claim 10, wherein the image sensor is moved within a range.

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