JP2008070566A - Camera system, camera body, interchangeable lens unit and image blur correction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging device capable of reducing the effect of a camera shake when photographing using an image display liquid crystal monitor 16 in a camera system 1. <P>SOLUTION: In a monitor photographic mode, light is made incident on an imaging sensor 11 by retracting a reflective mirror from an optical path and photographing takes place while a photographic image is viewed on an image display liquid crystal monitor 16. In the monitor photographic mode, the camera system 1 increases an amount of correction of image blur, thereby correcting the image blur corresponding to a large vertical blur in the monitor photographic mode. Thus, the camera system 1 makes an optimum correction to image blur whether in a finder photographic mode or the monitor photographic mode. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a camera system, a camera body, an interchangeable lens unit, and an image blur correction method in the camera system. In particular, the present invention relates to a single-lens reflex digital camera having an image blur correction function.

In recent years, single-lens reflex digital cameras that can convert an optical image of a subject into an electrical image signal and output the signal are rapidly spreading. In this single-lens reflex digital camera, when a photographer observes a subject using a viewfinder, the light path (that is, the subject image) incident on the photographing lens is reflected by a reflecting mirror disposed on the photographing optical path after the lens, thereby causing an optical path. By changing the above and making it a normal image through a pentaprism or the like and guiding it to the optical viewfinder, the subject image through the lens can be viewed from the optical viewfinder. Therefore, normally, the position where the finder optical path is formed is the fixed position of the reflecting mirror.
On the other hand, when the lens is used for photographing, the position of the reflecting mirror is instantaneously switched, and the finder optical path is switched to the photographing optical path by retracting the reflecting mirror from the photographing optical path. When the photographing is finished, the reflecting mirror is instantaneously returned to the home position. This method is the same for both conventional silver salt cameras and digital cameras as long as they are single lens reflex systems.
One of the features of digital cameras is that you can shoot while looking at a display device (for example, a liquid crystal monitor for image display) at the time of shooting, and check the shot image immediately after shooting. When this method is used, a display device such as an image display liquid crystal monitor cannot be used during photographing. Since the photographer looks into the viewfinder and cannot take pictures using a display device such as a liquid crystal monitor for image display, it is extremely difficult to use, especially for beginners unfamiliar with digital camera photography. turn into.

In view of this, a single-lens reflex digital camera having a function capable of photographing using a display device such as an image display liquid crystal monitor has been proposed (for example, Patent Document 1).
There has also been proposed a single-lens reflex digital camera equipped with a camera shake (image blur) correction function that corrects camera shake (image blur) caused by camera shake or the like.
JP 2001-125173 A

However, when the photographer is shooting while looking at a display device such as an image display liquid crystal monitor, the same camera shake correction as that when shooting through the viewfinder is performed. In a captured image displayed on a display device such as the above, a sufficient image blur correction effect cannot be obtained.
This is because when the photographer takes a picture through the viewfinder window (shooting in the viewfinder shooting mode) and when the photographer takes a picture while watching the monitor display (shooting in the monitor shooting mode), This is because the posture with the system is different, and the manner of occurrence of blur and the amount of blur are different. That is, the rotation that causes blurring when the photographer shoots while looking at the monitor display, rather than the distance from the rotation center that causes blurring when the photographer shoots through the viewfinder window. Since the distance from the center to the camera system becomes longer, the amount of blurring when the photographer shoots while looking at the monitor display tends to be larger than the amount of blurring when shooting through the viewfinder window.
The problem to be solved by the present invention is that an optimal camera shake (in both cases where the photographer shoots while looking at a display device such as a liquid crystal monitor for image display) It is to realize a camera system that realizes (image blur) correction, and a camera body and an interchangeable lens unit that are used in the camera system.

  Another object is to realize a camera shake (image blur) correction method used in the camera system.

A first invention is a camera system including an imaging optical system, an imaging unit, an observation optical system, a movable mirror, a shooting mode switching unit, a motion detection unit, and a captured image display unit. The imaging optical system collects light from the subject. The imaging unit acquires a captured image by converting light from the imaging optical system into an electrical signal. The observation optical system is for observing light from the imaging optical system. The movable mirror is installed between the imaging optical system and the imaging unit, and has a first position for guiding the light from the imaging optical system to the observation optical system, and for guiding the light from the imaging optical system to the imaging unit. A second position may be taken. The shooting mode switching unit has a first shooting mode for shooting with the movable mirror positioned at the first position, and a second shooting mode for shooting with the movable mirror positioned at the second position. Switch. The motion detection unit detects the motion of the camera system due to vibration. The motion correction unit has a first correction amount when the shooting mode is the first shooting mode, and a second correction larger than the first correction amount when the shooting mode is the second shooting mode. The movement of the captured image is corrected by the amount. The captured image display unit displays a captured image.
In this camera system, light from a subject is collected by an imaging optical system, and light from the imaging optical system is converted into a captured image as an electrical signal by an imaging unit. On the other hand, the light from the imaging optical system can be observed by the observation optical system. That is, a movable mirror is installed between the imaging optical system and the imaging unit, and when the imaging mode is the first imaging mode, the movable mirror is disposed at the first position, The light is guided to the observation optical system, and when the shooting mode is the second shooting mode, the movable mirror is disposed at the second position, and the light from the imaging optical system is guided to the imaging unit. The shooting mode is determined by being switched by the shooting mode switching unit in accordance with a photographer's instruction. The movement of the captured image is a second correction amount that is greater than the first correction amount when the shooting mode is the first shooting mode, and greater than the first correction amount when the shooting mode is the second shooting mode. It is corrected with the correction amount. The corrected captured image is displayed on the captured image display unit.

In this camera system, the light from the subject can be guided to the observation optical system or the imaging unit by the movable mirror, so that the photographer takes a picture using the observation optical system (photographing through a so-called finder window). It is also possible to take a picture while viewing the photographed image acquired by the imaging unit on the captured image display unit. Further, the camera system changes a correction amount in motion correction in the first shooting mode (finder shooting mode) and a correction amount in motion correction in the second shooting mode (monitor shooting mode). Therefore, by setting the correction amount in the second shooting mode (monitor shooting mode) to a correction amount larger than the correction amount in the first shooting mode (finder shooting mode), the first shooting mode (finder shooting mode) In both cases and the second shooting mode (monitor shooting mode), the optimum image blur correction can be realized.
Here, the correction amount means, for example, a physical quantity that acts on the camera system in order to cancel a shift in image formation (image formation blur) at the imaging unit due to camera system shake.
2nd invention is 1st invention, Comprising: A movement correction | amendment part has a blurring correction lens group and the shift control part which moves a blurring correction lens group. When the shooting mode is the first shooting mode, the shift control unit corrects the movement of the captured image by moving the blur correction lens group by the first shift amount, and is in the second shooting mode. In this case, the movement of the captured image is corrected by moving the blur correction lens group by a second shift amount larger than the first shift amount.

As a result, even when the rotation center that causes blurring in the second shooting mode (monitor shooting mode) is at a position that is far away from the camera system in the horizontal direction, and the amount of blurring of the camera system is large. In this camera system, an optimum image blur correction can be realized by increasing the shift amount of the blur correction lens group.
3rd invention is 1st invention, Comprising: A motion correction part has the shift control part which moves a blurring correction lens group, and the blurring correction lens group. The shift control unit sets the movable range in which the blur correction lens group is moved within the first movable range when the shooting mode is the first shooting mode, and the blur correction lens when the shooting mode is the second shooting mode. Let the movable range which moves a group be the 2nd movable range wider than the 1st movable range.
In this camera system, when the shooting mode is the first shooting mode, the shift control unit moves the movement of the captured image while setting the movable range in which the blur correction lens group is moved within the first movable range. Correction is performed by moving the blur correction lens group within the range, and in the second shooting mode, the movable range in which the blur correction lens group is moved is shifted as the second movable range wider than the first movable range. Correction is performed by moving the vibration reduction lens group within the movable range by the control unit.

As a result, even when the rotation center that causes blurring in the second shooting mode (monitor shooting mode) is at a position that is far away from the camera system in the horizontal direction, and the amount of blurring of the camera system is large. In this camera system, since the range in which the blur correction lens group can be moved is wide, optimal image blur correction can be realized.
A fourth invention is any one of the first to third inventions, a camera body having an imaging unit, an observation optical system, a movable mirror, a shooting mode switching unit, and a captured image display unit, an imaging optical system, a motion And an interchangeable lens unit having a detection unit and a motion correction unit.
Thereby, a camera system can be comprised using the camera main body and interchangeable lens unit which are separate components.
According to a fifth aspect of the present invention, there is provided an imaging optical system that collects light from a subject, a motion detection unit that detects a motion of a camera system due to vibration, and a detection mode that is based on a detection result of the motion detection unit. And a motion correction unit that corrects the motion of the captured image with a second correction amount larger than the first correction amount when the shooting mode is the second shooting mode. It is a camera body used for a camera system together with a lens unit. The camera body includes an imaging unit, an observation optical system, a movable mirror, a shooting mode switching unit, and a captured image display unit. The imaging unit obtains a captured image by converting light from the subject into an electrical signal. The observation optical system is for observing light from the imaging optical system. The movable mirror is installed between the imaging optical system and the imaging unit, and has a first position for guiding the light from the imaging optical system to the observation optical system, and for guiding the light from the imaging optical system to the imaging unit. A second position may be taken. The shooting mode switching unit has a first shooting mode for shooting with the movable mirror positioned at the first position, and a second shooting mode for shooting with the movable mirror positioned at the second position. Switch. The captured image display unit displays a captured image.

In this camera body, the correction amount in motion correction in the first shooting mode (finder shooting mode) and the correction amount in motion correction in the second shooting mode (monitor shooting mode) can be changed. Therefore, by setting the correction amount in the second shooting mode (monitor shooting mode) to a correction amount larger than the correction amount in the first shooting mode (finder shooting mode), the first shooting mode (finder shooting mode) and In any of the two shooting modes (monitor shooting mode), it is possible to realize optimal image blur correction.
Further, this camera body can realize a camera body that constitutes a camera system together with the interchangeable lens unit.
According to a sixth aspect of the present invention, there is provided an imaging unit that converts a light from a subject into an electrical signal to acquire a captured image, an observation optical system for observing the light from the subject, and a light from the subject to the observation optical system. A movable mirror capable of taking a first position for imaging and a second position for guiding light from the subject to the imaging unit, and a first imaging mode for imaging by arranging the position of the movable mirror at the first position A camera system, and a camera system including a shooting mode switching unit that switches between a second shooting mode in which the position of the movable mirror is arranged at the second position, and a captured image display unit that displays a captured image. Is an interchangeable lens unit used in The interchangeable lens unit includes an imaging optical system, a motion detection unit, and a motion correction unit. The imaging optical system collects light from the subject. The motion detection unit detects the motion of the camera system due to vibration. The motion correction unit is based on the detection result of the motion detection unit, and the first correction amount when the shooting mode is the first shooting mode, and the first correction amount when the shooting mode is the second shooting mode. The motion of the captured image is corrected with a larger second correction amount.

In this interchangeable lens unit, it is possible to change the correction amount in motion correction in the first shooting mode (finder shooting mode) and the correction amount in motion correction in the second shooting mode (monitor shooting mode). Therefore, by setting the correction amount in the second shooting mode (monitor shooting mode) to a correction amount larger than the correction amount in the first shooting mode (finder shooting mode), the first shooting mode (finder shooting mode) and In any case of the second shooting mode (monitor shooting mode), optimal image blur correction can be realized.
Also, with this interchangeable lens unit, an interchangeable lens unit that constitutes a camera system together with the camera body can be realized.
According to a seventh aspect of the present invention, there is provided an imaging optical system that collects light from a subject, an imaging unit that converts the light from the imaging optical system into an electrical signal to acquire a captured image, and observes light from the imaging optical system A first position for guiding the light from the imaging optical system to the observation optical system and the light from the imaging optical system to the imaging unit This is an image blur correction method in a camera system including a movable mirror capable of taking the second position. The image blur correction method includes a shooting mode switching step, a movable mirror moving step, a motion detection step, a motion correction step, and a captured image display step. In the shooting mode switching step, a first shooting mode for shooting with the movable mirror positioned at the first position and a second shooting mode for shooting with the movable mirror positioned at the second position are provided. Switch. In the movable mirror moving step, the movable mirror is moved to the first position in the first photographing mode, and the movable mirror is moved to the second position in the second photographing mode. In the motion detection step, the motion of the camera system due to vibration is detected. In the motion correction step, based on the detection result in the motion detection step, the first correction amount is used when the shooting mode is the first shooting mode, and the first correction is performed when the shooting mode is the second shooting mode. The motion of the captured image is corrected with a second correction amount that is larger than the amount. In the captured image display step, the captured image is displayed.

In a camera system using this image blur correction method, light from a subject is collected by an imaging optical system, and light from the imaging optical system is further converted into a captured image as an electrical signal by an imaging unit. On the other hand, the light from the imaging optical system can be observed by the observation optical system. That is, a movable mirror is installed between the imaging optical system and the imaging unit, and when the imaging mode is the first imaging mode, the movable mirror is disposed at the first position, The light is guided to the observation optical system, and when the shooting mode is the second shooting mode, the movable mirror is disposed at the second position, and the light from the imaging optical system is guided to the imaging unit. The shooting mode is determined by being switched by the shooting mode switching unit in accordance with a photographer's instruction. In this image blur correction method, the motion of the captured image is the first correction when the shooting mode is the first shooting mode according to the motion of the camera system detected at the motion detection step. When the shooting mode is the second shooting mode, the amount is corrected with a second correction amount that is larger than the first correction amount. The captured image whose motion is corrected is displayed in the captured image display step.
In this image blur correction method, the correction amount in the second shooting mode (monitor shooting mode) is set to be larger than the correction amount in the first shooting mode (finder shooting mode), so that the first shooting mode (viewfinder shooting mode) is set. In either case of the shooting mode) or the second shooting mode (monitor shooting mode), optimal image blur correction can be realized.

8th invention is 7th invention, Comprising: A camera system is further provided with the blurring correction lens group and the shift control part which moves a blurring correction lens group. In the motion correction step, the shift control unit corrects the motion of the captured image by moving the blur correction lens group by the first shift amount when the shooting mode is the first shooting mode, and the second In this shooting mode, the motion of the captured image is corrected by moving the blur correction lens group by a second shift amount larger than the first shift amount.
As a result, even when the rotation center that causes blurring in the second shooting mode (monitor shooting mode) is at a position that is far away from the camera system in the horizontal direction, and the amount of blurring of the camera system is large. In this camera system, an optimum image blur correction can be realized by increasing the shift amount of the blur correction lens group.
9th invention is 7th invention, Comprising: A camera system is further provided with the blurring correction lens group and the shift control part which moves a blurring correction lens group. In the movement correction step, the shift control unit corrects the movement of the captured image by setting the movable range in which the blur correction lens group is moved within the first movable range when the shooting mode is the first shooting mode, In the second shooting mode, the movement range of the captured image is corrected using the movable range in which the blur correction lens group is moved as a second movable range wider than the first movable range.

In this image blur correction method, the movement of the captured image is determined by setting the movable range in which the blur correction lens group is moved within the first movable range when the shooting mode is the first shooting mode in the motion correction step. The shift control unit corrects the movement by moving the blur correction lens group within the movable range, and in the second shooting mode, the movable range in which the blur correction lens group is moved is wider than the first movable range. The second movable range is corrected by moving the blur correction lens group within the movable range by the shift control unit.
As a result, even when the rotation center that causes blurring in the second shooting mode (monitor shooting mode) is at a position that is far away from the camera system in the horizontal direction, and the amount of blurring of the camera system is large. In this camera system, since the range in which the blur correction lens group can be moved is wide, optimal image blur correction can be realized.

According to the present invention, the optimum camera shake (image blur) correction is performed regardless of whether the photographer shoots while looking at a display device such as an image display liquid crystal monitor or when looking at the viewfinder. And a camera body and an interchangeable lens unit used in the camera system can be realized.
Further, according to the present invention, it is possible to realize a camera shake (image blur) correction method used in the camera system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
<1: Overall configuration of camera system>
A camera system according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is an overall configuration diagram of a camera system according to the first embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a camera body, and FIG. 3 is a schematic configuration diagram of an interchangeable lens unit.
As shown in FIG. 1, the camera system 1 is an interchangeable lens type single-lens reflex digital camera system, and mainly includes a camera body 3 having main functions of the camera system 1 and a detachable attachment to the camera body 3. The interchangeable lens unit 2 is configured. The interchangeable lens unit 2 is attached to a lens mount 70 provided on the front surface of the camera body 3.
(1.1: Interchangeable lens unit)
The interchangeable lens unit 2 constitutes an imaging optical system L for connecting a subject image to the imaging sensor 11 in the camera system 1, and mainly includes a focus adjustment unit 80 that performs focusing and an aperture adjustment unit 81 that adjusts the aperture. A shake detection unit 21 that detects camera shake due to camera shake, an image blur correction unit 82 that corrects image blur due to camera shake, an aperture control unit 27 that controls the aperture adjustment unit 81, and an image blur correction unit The image blur correction control unit 23 that controls 82 and the lens microcomputer 20 that controls various sequences of the interchangeable lens unit 2 are configured.

The blur detection unit 21 serves as a motion detection unit, and the image blur correction unit 82 serves as a motion correction unit.
The focus adjustment unit 80 mainly includes a focus lens group 24 that adjusts the focus, and a focus lens group control unit 25 that controls the operation of the focus lens group 24. The aperture adjustment unit 81 mainly includes an aperture unit 26 that adjusts the aperture or opening, and an aperture control unit 27 that controls the operation of the aperture unit 26.
The blur detection unit 21 mainly includes an angular velocity sensor 41 that detects the motion of the camera system 1 itself including the imaging optical system L, and a high frequency band that removes a DC drift component in an unnecessary band component included in the output of the angular velocity sensor 41. The HPF 42 as a pass filter, the LPF 43 as a low pass filter for removing the resonance frequency component and noise component of the unnecessary band component included in the output of the angular velocity sensor 41, and the adjustment of the output signal level of the angular velocity sensor 41 are adjusted. The amplifier 44 is configured to include an A / D converter 45 that converts an output signal of the amplifier 44 into a digital signal. The angular velocity sensor 41 outputs both positive and negative angular velocity signals depending on the direction of movement of the camera system 1 with reference to the output when the camera system 1 is stationary. The angular velocity sensor 41 is a sensor that detects a movement in the yawing direction orthogonal to the optical axis, for example. Examples of the angular velocity sensor 41 include a gyro sensor. In FIG. 4, the angular velocity sensor 41 in only one direction is shown, and the shake detection unit in the pitching direction is omitted. As described above, the angular velocity sensor 41 built in the shake detection unit 21 has a function of detecting the movement of the camera system 1 due to camera shake and other vibrations.

The image blur correction unit 82 mainly includes a blur correction lens group 22 that constitutes a part of the imaging optical system L and an image blur correction control unit 23. The image blur correction control unit 23 mainly includes a D / A conversion unit 46, a shift control unit 47, and a movement amount detection unit 40. The D / A converter 46 receives the correction lens drive control signal for driving the blur correction lens group 22 output from the lens microcomputer 20 and performs DA conversion. The shift control unit 47 moves the blur correction lens group 22 in a plane orthogonal to the optical axis (optical path X) of the imaging optical system L based on the correction lens drive control signal. The movement amount detection unit 40 detects the actual movement amount of the blur correction lens group 22. Further, the blur correction lens group 22, the shift control unit 47, and the movement amount detection unit 40 constitute a negative feedback control loop as shown in FIG. 4, and the shift control unit 47 includes the movement amount detection unit 40. The movement control of the blur correction lens group 22 is performed so that the actual movement amount of the blur correction lens group 22 detected from the above is less than a predetermined amount. The image blur correction control unit 23 mainly includes a D / A conversion unit 46, a shift control unit 47, and a movement amount detection unit 40.
The lens microcomputer 20 is a control device that controls the center of the interchangeable lens unit 2, and is connected to each unit mounted on the interchangeable lens unit 2, and controls various sequences of the interchangeable lens unit 2. The lens microcomputer 20 includes, for example, a CPU 34, a ROM 36, and a RAM 35, and various functions can be realized by reading a program stored in the ROM 36 into the CPU. The lens microcomputer 20 outputs a command (for example, a control signal or a command) to the focus lens group control unit 25, the aperture control unit 27, the shift control unit 47, and the like, so that the focus lens group control unit 25, the aperture control unit. 27, causing the shift control unit 47 and the like to execute the respective controls. The lens microcomputer 20 is connected to the body microcomputer 12 via an interface, and performs communication between the body microcomputer 12 and the microcomputer.

(1.2: Camera body)
The camera body 3 mainly includes a quick return mirror 4 that changes the path of light from the subject, a finder optical system 19 for visually recognizing the subject image, a focus detection unit 5 that performs focus detection, and a shutter that performs opening and closing operations of the shutter. Unit 10, imaging unit 71 that acquires a subject image as a captured image, image display unit 72 that displays the captured image, a shooting mode switching switch 51 that switches the shooting mode, a shutter control unit 14 that controls the shutter unit 10, and a captured image An image storage unit 73 to be stored and a body microcomputer 12 that controls various sequences of the camera body 3 are configured.
The finder optical system 19 is an observation optical system, the quick return mirror 4 is a movable mirror, the shooting mode changeover switch 51 is a shooting mode switching unit, and the image display unit 72 is a captured image display unit.
The quick return mirror 4 is mainly composed of a main mirror 4a capable of reflecting and transmitting incident light and a sub mirror 4b provided on the back side of the main mirror 4a and reflecting transmitted light from the main mirror 4a. The quick return mirror control unit 29 can jump out of the optical path X. The quick return mirror 4 is installed to be movable between the position shown in FIG. 5 and the position shown in FIG. Further, the incident light is split into two light beams by the main mirror 4 a, the reflected light beam is guided to the finder optical system 19, and the transmitted light beam is reflected by the sub mirror 4 b and guided to the focus detection unit 5.

The finder optical system 19 mainly includes a finder screen 6 on which a subject image is formed, a pentaprism 7 that converts the subject image into an erect image, an eyepiece lens 8 that guides the erect image of the subject to the finder eyepiece window 9, and A finder eyepiece window 9 through which a photographer observes a subject image is configured.
The focus detection unit 5 is a unit that detects whether or not the image formed by the light from the subject is in focus by the reflected light from the sub-mirror 4b (detects the focus). For example, a general phase difference detection is performed. Focus detection is performed according to the method.
The imaging unit 71 mainly includes an imaging sensor 11 such as a CCD that performs photoelectric conversion, and an imaging sensor control unit 13 that controls the imaging sensor 11, and acquires a subject image as a captured image. The subject image by incident light is converted into an electrical signal that forms a captured image by the imaging unit.
The image display unit 72 includes an image display liquid crystal monitor 16 and an image display control unit 15 that controls the operation of the image display liquid crystal monitor 16.
The image storage unit 73 includes, for example, an image recording / reproducing unit 18 that records and reproduces a captured image on a card-type recording medium (not shown), and an image recording control unit 17 that controls the operation of the image recording / reproducing unit 18. It is configured.

The body microcomputer 12 is a control device that controls the center of the camera body 3 and controls various sequences. The body microcomputer 12 is equipped with, for example, a CPU, a ROM, and a RAM, and the body microcomputer 12 can realize various functions by reading a program stored in the ROM into the CPU. The body microcomputer 12 outputs a command (for example, a control signal or a command) to the shutter control unit 14, the image sensor control unit 13, the image display control unit 15, the image recording control unit, etc. The imaging sensor control unit 13, the image display control unit 15 and the like are caused to execute respective controls. The body microcomputer 12 is connected to the lens microcomputer 20 via an interface, and performs communication between the lens microcomputer 20 and the microcomputer.
<2: Operation of the camera system>
The shooting operation of the camera system 1 will be described with reference to FIGS.
(2.1: Operation before shooting)
As shown in FIGS. 1 and 5, light from a subject (not shown) passes through the lens group (24 and 22 in FIG. 1) of the interchangeable lens unit 2 and enters the main mirror 4a which is a semi-transmissive mirror. To do. Part of the light incident on the main mirror 4a is reflected and incident on the finder screen 6, and the remaining light is transmitted and incident on the sub-mirror 4b. The light incident on the finder screen 6 is formed as a subject image. This subject image is converted into an erect image by the pentaprism 7 and enters the eyepiece 8. Thus, the photographer can observe an erect image of the subject through the viewfinder eyepiece window 9. The light incident on the sub mirror 4 b is reflected and enters the focus detection unit 5.

(2.2: Shooting operation in viewfinder shooting mode)
As shown in FIGS. 1 and 5, when the photographer takes a picture through the viewfinder eyepiece window 9 (in the case of photographing in the viewfinder photographing mode), when the photographer presses the release button 50 halfway, Electric power is supplied to the body microcomputer 12 and the various units, and the body microcomputer 12 and the lens microcomputer 20 are activated.
The body microcomputer 12 and the lens microcomputer 20 are programmed to transmit / receive information to / from each other at the time of activation, for example, via an electrical section (not shown) of the lens mount 70, and from the memory part of the lens microcomputer 20 to the body microcomputer 12. Lens information regarding the interchangeable lens unit 2 is transmitted, and this lens information is stored in a memory unit (not shown) of the body microcomputer 12.
Next, a focus shift amount (hereinafter referred to as Df amount) is acquired by the focus detection unit 5 based on the reflected light from the sub mirror 4b. A command is transmitted from the body microcomputer 12 to the lens microcomputer 20 to drive the focus lens group 24 by the amount of Df. Specifically, the focus lens group control unit 25 moves the focus lens group 24 by the amount of Df in accordance with a command from the lens microcomputer 20. Thus, by repeating the focus detection and the driving of the focus lens group 24, the amount of Df can be reduced. When the Df amount becomes equal to or less than the predetermined amount, the body microcomputer 12 determines that the focus is achieved, and the drive of the focus lens group 24 is stopped.

Thereafter, when the release button 50 is fully pressed by the photographer, a command is transmitted from the body microcomputer 12 to the lens microcomputer 20 to obtain an aperture value calculated based on an output from a photometric sensor (not shown). . Then, in accordance with a command from the lens microcomputer 20, the aperture controller 27 narrows the aperture down to the instructed aperture value. Simultaneously with the instruction of the aperture value, the quick return mirror control unit 29 retracts the quick return mirror 4 from the optical path X. After the evacuation is completed, the image sensor control unit 13 outputs a drive command for the image sensor 11 and instructs the operation of the shutter unit 10. The image sensor control unit 13 exposes the image sensor 11 for the time of the shutter speed calculated based on the output from the photometric sensor (not shown).
After the exposure is completed, the image sensor control unit 13 reads the image data from the image sensor 11, and after predetermined image processing, the image data is output to the image display control unit 15 via the body microcomputer 12. As a result, the photographed image is displayed on the image display liquid crystal monitor 16. Further, the image data is stored in the storage medium via the image recording control unit 17 and the image recording / reproducing unit 18. After the exposure is completed, the body microcomputer 12 resets the quick return mirror 4 and the shutter unit 10 to the initial positions. Further, a command is issued from the body microcomputer 12 to the lens microcomputer 20 to reset the diaphragm to the open position, and a reset command is issued from the lens microcomputer 20 to each unit. After the reset is completed, the lens microcomputer 20 informs the body microcomputer 12 of the reset completion. The body microcomputer 12 waits for the reset completion information from the lens microcomputer 20 and the completion of the series of processes after exposure, and then confirms that the state of the release button is not depressed, and ends the photographing sequence.

(2.3: Shooting operation in monitor shooting mode)
Next, the photographing operation of the camera system 1 when the photographer takes a picture using the image display liquid crystal monitor 16 (when photographing in the monitor photographing mode) will be described with reference to FIGS. 1 and 6.
When photographing using the image display liquid crystal monitor 16, the photographer operates the monitor photographing mode changeover switch 51 to set the monitor photographing mode. When the monitor photographing mode is set, the body microcomputer 12 retracts the quick return mirror 4 from the optical path X. In this state, since the light from the subject reaches the image sensor 11, the image sensor 11 can convert the light from the subject imaged on the image sensor 11 into image data and obtain it. The imaging sensor control unit 13 reads the image data acquired by the imaging sensor 11, executes predetermined image processing, and then outputs the image processed image data to the image display control unit 15. The image display control unit 15 causes the image display liquid crystal monitor 16 to display the image data output from the imaging sensor control unit 13 as a captured image. In this way, by displaying the captured image on the image display liquid crystal monitor 16, the photographer looks at the captured image displayed on the image display liquid crystal monitor 16 without looking through the viewfinder eyepiece window 9. It becomes possible to chase.

Next, when the release button 50 is half-pressed by the photographer, the body microcomputer 12 in the camera system 1 passes through the electrical section (not shown) of the lens mount 70 from the lens microcomputer 20 in the interchangeable lens unit 2. Various lens data are received and stored in the memory unit of the body microcomputer 12.
Next, a focus shift amount (hereinafter referred to as Df amount) is acquired by the focus detection unit 5 based on the reflected light from the sub mirror 4b. A command is transmitted from the body microcomputer 12 to the lens microcomputer 20 to drive the focus lens group 24 by the amount of Df. Specifically, the focus lens group control unit 25 is controlled by the lens microcomputer 20, and the focus lens group 24 moves by the amount of Df. Thus, by repeating the focus detection and the driving of the focus lens group 24, the amount of Df can be reduced. When the Df amount becomes equal to or less than the predetermined amount, the body microcomputer 12 determines that the focus is achieved, and the drive of the focus lens group 24 is stopped.
Next, in accordance with a command from the body microcomputer 12, the quick return mirror control unit 29 returns the quick return mirror 4 to a fixed position in the optical path X, and the Df amount is acquired from the focus detection unit 5. The body microcomputer 12 instructs the lens microcomputer 20 to drive the focus lens group 24 by the amount of Df. The lens microcomputer 20 controls the focus lens group control unit 25 to operate the focus lens group 24 by the amount of Df. By repeating the focus detection and the driving of the focus lens group 24 in this way, the amount of Df can be reduced. When the Df amount becomes equal to or less than the predetermined amount, the body microcomputer 12 determines that the focus is achieved, and the drive of the focus lens group 24 is stopped.

Thereafter, when the release button 50 is fully pressed by the photographer, a command is transmitted from the body microcomputer 12 to the lens microcomputer 20 to obtain an aperture value calculated based on an output from a photometric sensor (not shown). . Then, the lens microcomputer 20 controls the aperture controller 27 to narrow the aperture to the instructed aperture value. The quick return mirror control unit 29 retracts the quick return mirror 4 from the optical path X in accordance with a command from the body microcomputer 12 simultaneously with the aperture value instruction. After completion of the evacuation, in accordance with a command from the body microcomputer 12, the imaging sensor control unit 13 instructs to drive the imaging sensor 11, and the shutter control unit 14 instructs the operation of the shutter unit 10. The image sensor control unit 13 exposes the image sensor 11 for the time of the shutter speed calculated based on the output from the photometric sensor (not shown).
After the exposure is completed, the image sensor control unit 13 reads image data from the image sensor 11, and after predetermined image processing, the image data is output to the image display control unit 15 via the body microcomputer 12. As a result, the photographed image is displayed on the image display liquid crystal monitor 16. Further, the image data is stored in the storage medium via the image recording control unit 17 and the image recording / reproducing unit 18. Further, since the quick return mirror 4 is located in the state of being retracted from the optical path X after the exposure is completed, the photographer continues to use the subject as a photographed image on the image display liquid crystal monitor 16 in the monitor photographing mode. Can see.

Further, when canceling the monitor photographing mode, the photographer operates the monitor changeover switch 51 to shift to the normal photographing mode, that is, the finder photographing mode in which the finder eyepiece window 9 is photographed. When the mode is changed to the finder photographing mode, the quick return mirror 4 is returned to a predetermined position in the optical path X. The quick return mirror 4 is also returned to a predetermined position in the optical path X when the power source of the camera system 1 (for example, a single-lens reflex digital camera) is turned off.
(2.4: General operation of image blur correction of camera system)
Next, the image blur correction operation of the camera system 1 will be described with reference to FIG.
When the camera system 1 is moved by camera shake or the like, the angular velocity sensor 41 shown in FIG. 4 outputs an angle signal corresponding to the movement of the camera system 1. The angle signal output from the angular velocity sensor 41 is output to the lens microcomputer 20 via the amplifier 44 and the A / D converter 45 after the HPF 42 and the LPF 43 remove unnecessary low frequency components and unnecessary high frequency components. Is done. The lens microcomputer 20 performs filtering, integration processing, phase compensation, gain adjustment, clip processing, and the like on the angle signal input to the lens microcomputer 20 to obtain a drive control amount of the blur correction lens group 22 necessary for motion correction. This is output as a shake correction lens drive control signal. The blur correction lens drive control signal output from the lens microcomputer 20 is input to the shift control unit 47 via the D / A conversion unit 46. The shift control unit 47 moves the blur correction lens group 22 based on the input correction lens drive control signal. The movement amount by which the blur correction lens group 22 is actually moved by the shift control unit 47 is detected by the movement amount detection unit 40, and the detected movement amount is input to the shift control unit 47. The shift control unit 47 controls the actual movement amount detected by the movement amount detection unit 40 so as to approach the movement amount (movement amount as a target value) of the blur correction lens group determined by the correction lens control signal ( (Negative feedback control). As described above, the blur correction lens group 22 can be moved so as to cancel the image blur caused by the movement of the camera system 1, so that the image blur correction is realized in the camera system 1.

(2.5: Method of shifting the blur correction lens group)
Next, a specific method for shifting the blur correction lens group 22 in the image blur correction operation will be described with reference to FIG.
FIG. 8A is an explanatory diagram in the case where the camera system 1 corrects the blur caused by the rotation at the center of the blur correction lens group 22. FIG. 8B is an explanatory diagram in the case where the camera system 1 corrects the blur caused by the rotation at the center of the blur correction lens group 22 and the blur caused by the translation in the vertical direction by h. It is.
In FIG. 8, reference numeral 22 denotes a shake correction lens group, 11 denotes an image sensor, A0 denotes an object point located at a distance D from the shake correction lens group 22 without image blur, and A1 denotes the shake correction lens group 22. A virtual object point of the object point A0 when a blur that rotates by an angle θ0 occurs at the center, L0 is an optical path connecting the virtual object point A1 and the center of the blur correction lens group 22, and r is an object without image blur. This is the distance between the image stabilization sensor group 22 and the image sensor 11 when the point A0 is imaged on the image sensor 11. Further, in FIG. 8B, L1 is a camera system 1 in which a blur (rotation angle θ0) that rotates around the center of the blur correction lens group 22 occurs and a blur that moves in the vertical direction (D1 direction) by h. This is an optical path that connects the virtual object point A1 and the center of the vibration reduction lens group 22 when the above occurs.

  In the state shown in FIG. 8A, the blur correction lens group 22 is shifted in the direction in which the blur is canceled so that the shift amount y = r · tan θ0 of the imaging point is obtained. In the state shown in FIG. If the blur correction lens group 22 is shifted in the direction in which the blur is canceled so that the shift amount y = r · tan θ1 of the image formation point, the image blur correction can be performed in the camera system 1. Note that θ0 is calculated based on, for example, a value obtained by integrating the angular velocity information detected by the shake detection unit 21. Further, θ1 can be obtained by the following equation.

なお、これらの演算処理は、レンズマイコン２０で実行される。
（２．６：撮影モードによるブレの発生メカニズムの相違について）
次に図９を用いて、ファインダ撮影モードとモニタ撮影モードとにおけるブレの発生メカニズムの相違について説明する。
図９は、本発明の第１実施形態に係るカメラシステム１の使用形態を示す概念図である。図９（ａ）は、ファインダ撮影モードでのカメラシステム１の使用形態を示す概念図であり、図９（ｂ）は、モニタ撮影モードでのカメラシステム１の使用形態を示す概念図である。Ｐ１はファインダ撮影モードで像ブレの主な原因となるカメラシステム１の回動中心、Ｐ２はモニタ撮影モードで像ブレの主な原因となるカメラシステム１の回動中心を表す。ファインダ撮影モードでは、回動中心Ｐ１での回転角度が図８（ａ）におけるθ０に相当する（回動中心Ｐ１での回転角度を、図８（ａ）のθ０の近似値とすることができる）。ファインダ撮影モードでは、回動中心Ｐ１がカメラシステム１のほぼ真下にくるので、上下方向の移動（ブレ）はほとんど生じない。一方、モニタ撮影モードでは、カメラシステム１の使用者（撮影者）が腕を伸ばして撮影する形態になるために上下方向の移動（ブレ）が生じやすい。つまり、図９（ｂ）に示すように、モニタ撮影モードの回動中心Ｐ２とカメラシステム１との水平方向の距離が大きいので、回動中心Ｐ２での回転によるブレは、カメラシステム１の上下方向の移動（ブレ）となる。例えば、使用者（撮影者）が腕を水平にＨ＝５００［ｍｍ］伸ばしたところにカメラシステム１を保持していることを想定して回動中心Ｐ２で角度θ０の回転が生じたとすると、ｈ＝Ｈ・ｔａｎθ０で表させる約ｈ［ｍｍ］の上下方向の移動（ブレ）が生じることになる。なお、この場合のブレ補正レンズ群２２の位置での上下方向のブレ量ｈ’は、ｈ’＝（ｒ＋Ｈ）・ｔａｎθ０となるが、Ｈの値がｒの値に比べてかなり大きいため、ｈ’をｈ（＝Ｈ・ｔａｎθ０）で近似することができる。

These arithmetic processes are executed by the lens microcomputer 20.
(2.6: Difference in blur generation mechanism depending on shooting mode)
Next, the difference in blur generation mechanism between the finder shooting mode and the monitor shooting mode will be described with reference to FIG.
FIG. 9 is a conceptual diagram showing a usage pattern of the camera system 1 according to the first embodiment of the present invention. FIG. 9A is a conceptual diagram illustrating a usage pattern of the camera system 1 in the finder shooting mode, and FIG. 9B is a conceptual diagram illustrating a usage pattern of the camera system 1 in the monitor shooting mode. P1 represents the rotation center of the camera system 1 that is the main cause of image blur in the finder shooting mode, and P2 represents the rotation center of the camera system 1 that is the main cause of image blur in the monitor shooting mode. In the finder photographing mode, the rotation angle at the rotation center P1 corresponds to θ0 in FIG. 8A (the rotation angle at the rotation center P1 can be an approximate value of θ0 in FIG. 8A). ). In the finder shooting mode, the rotation center P1 is almost directly below the camera system 1, so that there is almost no vertical movement (blur). On the other hand, in the monitor photographing mode, a user (photographer) of the camera system 1 takes a picture with his arms extended, and thus movement (blur) in the vertical direction is likely to occur. That is, as shown in FIG. 9B, since the horizontal distance between the rotation center P2 in the monitor photographing mode and the camera system 1 is large, the shake caused by the rotation at the rotation center P2 is the top and bottom of the camera system 1. It becomes a movement (blur) of direction. For example, assuming that the user (photographer) holds the camera system 1 where the arm is horizontally extended H = 500 [mm], and the rotation of the angle θ0 occurs at the rotation center P2. A vertical movement (blur) of about h [mm] expressed by h = H · tan θ0 occurs. In this case, the blur amount h ′ in the vertical direction at the position of the blur correction lens group 22 is h ′ = (r + H) · tan θ0, but since the value of H is considerably larger than the value of r, h 'Can be approximated by h (= H · tan θ0).

In the finder shooting mode and the monitor shooting mode, since the photographer has a different posture with the camera system 1, the relative positional relationship between the rotation center (P 1, P 2) that causes blurring and the camera system 1 is different. For this reason, in the monitor shooting mode, the distance between the camera system 1 and the rotation center is longer and the horizontal distance between the rotation center and the camera system 1 is longer than in the finder shooting mode. The blur amount in the shooting mode tends to be larger than the blur amount in the finder shooting mode. Further, in the finder shooting mode, the vertical blur of the camera system 1 hardly occurs in the monitor shooting. Prone to occur in mode.
(2.7: Image blur correction operation in viewfinder shooting mode)
Next, the image blur correction operation of the camera system 1 in the finder shooting mode according to the first embodiment of the present invention will be described with reference to FIG.
FIG. 10A shows a state when the viewfinder photographing mode is rotated by the angle θ0 in the direction D2 at the rotation center P1 (a state in which blurring due to the rotation of the angle θ0 occurs) (FIG. 10A). Middle dashed line). As shown in FIG. 10B, in the state of FIG. 10A, an image blur correction operation in the camera system 1 is executed so that the object point forms an image at the center of the image sensor 11. 22 is shifted by ya in the direction D3 perpendicular to the optical axis. Thereby, the image blur correction in the finder photographing mode can be realized.

(2.8: Image blur correction operation in monitor shooting mode)
Next, an image blur correction operation of the camera system 1 in the monitor photographing mode according to the first embodiment of the present invention will be described using FIG.
FIG. 11A shows a state (a state in which blurring occurs due to rotation of the angle θ0) when the monitor photographing mode is rotated by the angle θ0 in the direction D4 at the rotation center P2 (broken line in FIG. 11A). ). As shown in FIG. 11B, in the state of FIG. 11A, the image blur correction operation of the camera system 1 is executed, and the blur correction lens group is formed so that the object point forms an image at the center of the image sensor 11. 22 is shifted by yb in the direction D5 perpendicular to the optical axis. Thereby, the image blur correction in the monitor photographing mode can be realized. As described above with reference to FIG. 9B, it is assumed that, for example, the user (photographer) holds the camera system 1 at a position where his arm is horizontally extended by H = 500 [mm]. If the rotation of the angle θ0 occurs at the rotation center P2, the vertical movement (blur) of about h [mm] represented by h = H · tan θ0 occurs. In the case of the monitor photographing mode, it is necessary to correct this h by further shifting the blur correction lens group 22. Therefore, the shift control unit 47 shifts the blur correction lens group 22 by yb (yb> ya) which is a shift amount larger than the shift amount ya in the finder photographing mode, thereby realizing an image blur correction operation.

(2.9: Camera system shooting mode switching operation)
Next, the shooting mode switching operation of the camera system 1 will be described with reference to FIG.
The body microcomputer 12 of the camera system 1 determines whether or not the monitor photographing mode changeover switch 51 is ON / OFF, and when it is ON (corresponding to the monitor photographing mode), the process proceeds to Step 2 and when it is OFF (in the finder photographing mode). In response, the process proceeds to Step 6 (Step 1). When the monitor photographing mode is entered, the quick return mirror control unit 29 retracts the quick return mirror 4 out of the optical path X (Step 3), and the image sensor control unit 13 starts the operation of the image sensor 11 (Step 4). Next, the lens microcomputer 20 operates the image blur correction unit 82 to start an image blur correction operation using the correction amount (shift amount) in the monitor photographing mode (Step 4). Then, the image display control unit 15 displays the photographed image on the image display liquid crystal monitor 16 (Step 5), and the transition to the monitor photographing mode is completed.
On the other hand, when the monitor photographing mode changeover switch 51 is turned off in Step 1 (corresponding to the finder photographing mode), the image display control unit 15 turns off the display of the image display liquid crystal monitor 16 (Step 6), and controls the image sensor. The unit 13 stops the driving of the image sensor 11 (Step 7). Next, the lens microcomputer 20 operates the image blur correction unit 82 to start an image blur correction operation based on the correction amount (shift amount) in the finder photographing mode (Step 8). Here, the correction amount (shift amount) in the finder photographing mode is set to a correction amount (shift amount) smaller than the correction amount in the monitor photographing mode. Then, the quick return mirror 4 is stopped at a predetermined position in the optical path X (Step 9), and the switching to the monitor photographing mode is finished.

The correction amount referred to here is, for example, the image formation on the image sensor 11 due to the shake of the camera system 1 generated by rotating at the rotation center (for example, P1 and P2 in FIGS. 9 to 11). This refers to a physical quantity that acts on the camera system 1 in order to cancel the shift (image blur). For example, the movement amount (shift amount) of the blur correction lens group 22 when moving the blur correction lens group 22 for canceling the image shift (image blur) on the image sensor 11 is the correction amount referred to here. It corresponds to.
As described above, in the monitor shooting mode, the camera system 1 performs the image blur correction operation by using yb which is a shift amount larger than the shift amount ya in the finder shooting mode, so that the camera system 1 Therefore, it is possible to realize the optimum image blur correction in any shooting mode.
[Other Embodiments]
In the embodiment described above, the camera system 1 performs image blur correction by setting the shift amount of the blur correction lens group 22 in the monitor shooting mode as a value larger than the shift amount of the blur correction lens group 22 in the finder shooting mode. It is not necessary to be limited to this. For example, in the camera system 1, a shiftable range (hereinafter referred to as “shift movable range”) of the blur correction lens group 22 is set in advance, and the shift movable range in the monitor photographing mode is set to be greater than the shift movable range in the finder photographing mode. Also, a wide range may be set, and the camera shake correction operation may be executed in the camera system 1.

Moreover, each process of the said embodiment may be implement | achieved by hardware, and may be implement | achieved by software. Further, it may be realized by mixed processing of software and hardware.
The specific configuration of the present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the scope of the invention.

  The present invention is a camera system (for example, a single-lens reflex digital camera), a camera body, an interchangeable lens unit, and an image blur correction method that can reduce the influence of image blur when shooting using an image display liquid crystal monitor. This expands the convenience of the imaging apparatus and can be implemented in the field related to the imaging apparatus.

1 is an overall configuration diagram of a camera system according to a first embodiment of the present invention. 1 is a schematic configuration diagram of a camera body according to a first embodiment of the present invention. 1 is a schematic configuration diagram of an interchangeable lens unit according to a first embodiment of the present invention. 1 is a schematic configuration diagram of an interchangeable lens unit according to a first embodiment of the present invention. 1 is a conceptual diagram illustrating a viewfinder shooting mode according to a first embodiment of the present invention. The conceptual diagram explaining the monitor imaging | photography mode which concerns on 1st Embodiment of this invention. The flowchart figure which shows the switching operation of the imaging | photography mode which concerns on 1st Embodiment of this invention. Explanatory drawing about the shift method of the blurring correction lens group 22 in the image blurring correction | amendment operation | movement which concerns on 1st Embodiment of this invention. Explanatory drawing of the generation | occurrence | production mechanism of the blurring in the finder imaging | photography mode and monitor imaging | photography mode of the camera system which concerns on 1st Embodiment of this invention. Explanatory drawing of the image blurring correction | amendment operation | movement of the camera system 1 in the finder imaging | photography mode which concerns on 1st Embodiment of this invention. Explanatory drawing of the image blurring correction | amendment operation | movement of the camera system 1 in the monitor imaging | photography mode which concerns on 1st Embodiment of this invention.

Explanation of symbols

1 Digital camera (camera system)
2 Interchangeable Lens Unit 3 Camera Body L Imaging Optical System 20 Lens Microcomputer 21 Blur Detection Unit 23 Image Blur Correction Control Unit 80 Focus Adjustment Unit 81 Aperture Adjustment Unit 82 Image Blur Correction Unit 4 Quick Return Mirror 12 Body Microcomputer 19 Viewfinder Optical System (Observation) Optical system)
29 Quick Return Mirror Control Unit 50 Release Button 51 Shooting Mode Switch 70 Lens Mount 71 Imaging Unit 72 Image Display Unit 73 Image Storage Unit

Claims (9)

An imaging optical system that collects light from the subject;
An imaging unit that obtains a captured image by converting light from the imaging optical system into an electrical signal;
An observation optical system for observing light from the imaging optical system;
A first position that is installed between the imaging optical system and the imaging unit and guides light from the imaging optical system to the observation optical system, and guides light from the imaging optical system to the imaging unit. A movable mirror capable of taking a second position for
Shooting that switches between a first shooting mode in which the position of the movable mirror is placed at the first position and a second shooting mode in which the position of the movable mirror is placed at the second position and shot. A mode switching unit;
A motion detector for detecting the motion of the camera system due to vibration;
Based on the detection result of the motion detector, the first correction amount is used when the shooting mode is the first shooting mode, and the first correction amount when the shooting mode is the second shooting mode. A motion correction unit that corrects the motion of the captured image with a large second correction amount;
A captured image display unit for displaying the captured image;
A camera system comprising: The motion correction unit includes a shake correction lens group, and a shift control unit that moves the shake correction lens group,
The shift control unit corrects the movement of the captured image by moving the blur correction lens group by a first shift amount when the shooting mode is the first shooting mode, and the second In the case of the shooting mode, the movement of the captured image is corrected by moving the blur correction lens group by a second shift amount larger than the first shift amount.
The camera system according to claim 1. The motion correction unit includes a shake correction lens group, and a shift control unit that moves the shake correction lens group,
When the shooting mode is the first shooting mode, the shift control unit sets the movable range in which the blur correction lens group is moved within the first movable range, and when the shooting mode is the second shooting mode. Is a second movable range wider than the first movable range, the movable range to move the blur correction lens group,
The camera system according to claim 1. A camera body having the imaging unit, the observation optical system, the movable mirror, the shooting mode switching unit, and the captured image display unit;
An interchangeable lens unit having the imaging optical system, the motion detection unit, and the motion correction unit;
Further comprising
The camera system according to claim 1. When the imaging mode is the first imaging mode based on the imaging optical system that collects light from the subject, the motion detection unit that detects the motion of the camera system due to vibration, and the detection result of the motion detection unit An interchangeable lens comprising: a first correction amount; and a motion correction unit that corrects the movement of the captured image with a second correction amount that is larger than the first correction amount when the shooting mode is the second shooting mode. A camera body used in the camera system together with a unit,
An imaging unit that obtains a captured image by converting light from a subject into an electrical signal;
An observation optical system for observing light from the imaging optical system;
A first position that is installed between the imaging optical system and the imaging unit and guides light from the imaging optical system to the observation optical system, and guides light from the imaging optical system to the imaging unit. A movable mirror capable of taking a second position for
Shooting that switches between a first shooting mode in which the position of the movable mirror is placed at the first position and a second shooting mode in which the position of the movable mirror is placed at the second position and shot. A mode switching unit;
A captured image display unit for displaying the captured image;
Camera body with An imaging unit that obtains a captured image by converting light from the subject into an electrical signal, an observation optical system for observing the light from the subject, and a first for guiding the light from the subject to the observation optical system A movable mirror that can take a position of 1 and a second position for guiding light from the subject to the imaging unit, and a first photographing that shoots by placing the position of the movable mirror at the first position A camera body comprising: a shooting mode switching unit that switches between a mode and a second shooting mode in which the position of the movable mirror is arranged at the second position for shooting; and a captured image display unit that displays the captured image And an interchangeable lens unit used in a camera system,
An imaging optical system that collects light from the subject;
A motion detector for detecting the motion of the camera system due to vibration;
Based on the detection result of the motion detector, the first correction amount is used when the shooting mode is the first shooting mode, and the first correction amount when the shooting mode is the second shooting mode. A motion correction unit that corrects the motion of the captured image with a large second correction amount;
Interchangeable lens unit. An imaging optical system that collects light from a subject, an imaging unit that converts the light from the imaging optical system into an electrical signal to obtain a captured image, and observation optics for observing the light from the imaging optical system And a first position for guiding light from the imaging optical system to the observation optical system and light from the imaging optical system to the imaging unit. An image blur correction method in a camera system comprising a movable mirror capable of taking a second position for guiding,
Shooting for switching between a first shooting mode in which the position of the movable mirror is arranged at the first position and a second shooting mode in which the position of the movable mirror is arranged at the second position A mode switching step;
A movable mirror moving step of moving the movable mirror to the first position in the case of the first imaging mode and moving the movable mirror to the second position in the case of the second imaging mode; ,
A motion detection step of detecting motion of the camera system due to vibration;
Based on the detection result in the motion detection step, the first correction amount is used when the shooting mode is the first shooting mode, and the first correction amount is set when the shooting mode is the second shooting mode. A motion correction step of correcting the motion of the captured image with a larger second correction amount;
A captured image display step for displaying the captured image;
An image blur correction method comprising: The camera system further includes a shake correction lens group, and a shift control unit that moves the shake correction lens group,
In the motion correction step, the shift control unit moves the shake correction lens group by a first shift amount when the shooting mode is the first shooting mode, thereby moving the captured image. Correcting and correcting the movement of the captured image by moving the blur correction lens group by a second shift amount larger than the first shift amount in the second shooting mode.
The image blur correction method according to claim 7. The camera system further includes a shake correction lens group, and a shift control unit that moves the shake correction lens group,
In the motion correction step, the shift control unit sets the movable range in which the blur correction lens group is moved within the first movable range when the photographing mode is the first photographing mode. When the movement is corrected and in the second shooting mode, the movement of the captured image is corrected by setting the movable range for moving the blur correction lens group as a second movable range wider than the first movable range. To
The image blur correction method according to claim 7.

Images