JP2010281846A - Camera body, lens barrel and camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a camera system having a camera body and an interchangeable lens more convenient to use. <P>SOLUTION: The camera system 1 includes an interchangeable lens unit 2 and the camera body 3. The camera body 3 includes a zoom operation lever, and the interchangeable lens unit 2 is compatible with electric zoom and includes a zoom operation lever. A body microcomputer 10 of the camera body 3 assigns a function of a zoom operation member for optical zoom to either of the body-side zoom operation part and the lens-side zoom operation part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a digital camera body, a lens barrel, and a camera system capable of exchanging lenses.

  In recent years, digital single-lens reflex cameras that can convert an optical image of a subject into an electrical image signal and output the signal are rapidly spreading. In this digital single-lens reflex camera, when observing a subject using a finder by a user, light incident on the photographing lens (that is, a subject image) is reflected by a reflecting mirror disposed on the photographing optical path after the lens, thereby changing the optical path. The object image through the lens can be viewed from the optical viewfinder by changing the image and introducing the image upright through a pentaprism or the like to 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 shooting, the position of the reflecting mirror is instantly changed and retracted from the shooting optical path to switch the finder optical path to the shooting optical path. . 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) at the time of shooting, and you can check the shot image immediately after shooting. If used, there is a problem that the liquid crystal monitor cannot be used during photographing. As described above, since it is impossible to shoot using the liquid crystal monitor, it is necessary to take a picture through the viewfinder, so that it is very difficult to use especially for beginners who are unfamiliar with digital camera shooting. In recent years, functions such as moving image shooting as well as still image shooting are desired. In a digital single-lens reflex camera equipped with a moving image shooting function, it is predicted that the digital single-lens reflex camera is roughly divided into those corresponding to moving images and those not corresponding to the types of interchangeable lenses. As an interchangeable lens corresponding to a moving image, for example, a lens is devised so that the sound is quiet when driving the focus and zoom, and the sound is not recorded in a microphone during moving image shooting. On the other hand, as an interchangeable lens that does not support moving images, for example, a lens that produces a loud sound when driving focus or zoom, and that sound is recorded in a microphone during moving image shooting. Further, among interchangeable lenses that support moving image shooting, those equipped with an electric zoom that drives a zoom lens system by a motor are conceivable.

  Patent Document 1 discloses a configuration in which an interchangeable lens type digital single-lens reflex camera can shoot while looking at a liquid crystal monitor.

Patent Document 2 discloses a configuration for displaying a moving image on a display unit in an interchangeable lens type digital single-lens reflex camera.
JP 2001-125173 A JP 2005-311695 A

  Generally, in an interchangeable lens type digital single-lens reflex camera, a phase difference detection method is used as a focus detection method. Therefore, when performing focusing, it is necessary to arrange a reflection mirror on the optical path. Therefore, even with a conventional digital single-lens reflex camera, even if a still image can be taken in the monitor shooting mode, moving image shooting cannot be performed.

  Further, even if the camera body is compatible with moving image shooting, the interchangeable lens unit attached to the camera body does not necessarily support moving image shooting. If an interchangeable lens unit that does not support moving image shooting is attached to the camera body, system inconsistency occurs between the interchangeable lens unit and the camera body. If an interchangeable lens that does not support movie shooting cannot be used with a camera body that supports movie shooting, the interchangeable lens unit cannot be used effectively, making it convenient as a camera system. Lack.

  In addition, an interchangeable lens equipped with an electric zoom function may have a zoom operation lever on the interchangeable lens side. When connected to a camera body that has a zoom operation lever, the zoom operation lever competes and the system fails. there's a possibility that.

  However, there is no disclosure of this problem in Patent Document 1 and Patent Document 2.

  The present invention has been made to solve the above-described problem, and the system breaks down when an interchangeable lens unit equipped with an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever. An object of the present invention is to provide a camera body, a lens barrel, and a camera system that can improve the convenience of zoom operation without any problem.

  In order to solve the above-described problems, a camera body according to a first invention includes a mount in which a lens barrel can be attached and detached, an imaging unit that acquires an image of a subject, and a lens barrel that can be electrically optically zoomed. A camera body having an operation unit on the body side for operating the optical zoom when attached, information on whether or not the attached lens barrel is electrically optically zoomable and an optical zoom operation. A control unit that acquires lens information including information on whether or not to have a lens side zoom operation unit to be operated from the lens barrel and controls a function assigned to the main body side operation unit according to the lens information is provided. It is characterized by.

  Accordingly, since necessary functions can be assigned to the operation unit on the camera body side in accordance with the lens barrel attached to the camera body, system conflicts can be avoided and the convenience of zoom operation can be improved.

  According to a second aspect of the present invention, there is provided a camera body in which an optical zoom is provided when a control unit is equipped with a lens barrel having a lens-side zoom operation unit that can perform an optical zoom operation electrically and that operates an optical zoom operation. A function of operating an operation different from the operation is assigned to the operation unit on the main body side.

  As a result, different functions are assigned to the operation of the camera body side operation unit and the lens side zoom operation unit, so that both operations do not compete and the system does not break down. The convenience of operation can be improved.

  In the camera body according to the third invention, the control unit assigns a function for operating an operation different from the optical zoom operation to the main body side operation unit when a lens barrel that is not capable of electric optical zoom is mounted. It is characterized by that.

  As a result, a zoom operation command is not issued to the lens barrel that does not support optical zoom from the main body side operation unit, and system failure does not occur. Furthermore, since the operation other than the zoom operation is assigned to the operation unit on the camera body side, the convenience of the operation can be improved.

  A camera body according to a fourth aspect is characterized in that the control unit invalidates the operation of the body side operation unit when a lens barrel that is not capable of electric optical zoom is mounted.

  As a result, a zoom operation command is not issued to the lens barrel that does not support optical zoom from the main body side operation unit, and system failure does not occur.

  A camera body according to a fifth aspect of the present invention further includes an electronic zoom function for enlarging and displaying or recording a partial range of an acquired image, and the control unit includes a function for operating an electronic zoom magnification rate changing operation. It is assigned to the side operation unit.

  As a result, when the attached lens barrel has a lens-side zoom operation unit that can perform optical zoom with electric power and operates the optical zoom operation, or when it does not support electric zoom, Since the operation of the electronic zoom is assigned to the operation unit, the operation does not compete and the system does not fail. Furthermore, since the same function called zoom is assigned to the operation unit on the main body side, it is easy for the user to understand and the convenience of zoom operation can be improved.

  According to a sixth aspect of the present invention, there is provided a finder photographing mode for confirming and photographing a subject image guided to a viewfinder by a movable mirror inserted in an optical path, and a photographed image of a subject displayed on an image display unit. And an image display photographing mode for confirming and photographing, and when photographing in the finder photographing mode, the control unit invalidates the operation of the main body side operation unit.

  As a result, in the finder shooting mode where electronic zoom is not possible, the system will not fail even if the user accidentally operates the operation unit on the main body side in order to use the electronic zoom. Further, since the electronic zoom is effective in the image display shooting mode, it is possible to perform a zoom operation in accordance with the user's shooting method.

  In the camera body according to the seventh invention, when the control unit is capable of electric optical zooming and a lens barrel having a lens side zoom operation unit for operating the optical zoom operation is mounted, During the operation of the main body side operation unit, the operation of the lens side zoom operation unit is invalidated.

  This gives priority to the zoom operation of the lens side zoom operation unit, and even when the main unit side operation unit and the lens side zoom operation unit are operated at the same time, the two zoom operations do not compete and the system does not break down. The convenience of operation can be improved.

  In the camera body according to the eighth aspect of the invention, the control unit is capable of electrically optical zooming, and when a lens barrel having a lens-side zoom operation unit for operating the optical zoom operation is attached, The operation of the main body side operation unit is invalidated during the operation of the lens side zoom operation unit.

  This gives priority to the zoom operation of the main unit side operation unit, and even if the main unit side operation unit and the lens side zoom operation unit are operated at the same time, the two zoom operations will not compete and the system will not break down. Convenience can be improved.

  According to a ninth aspect of the invention, a camera body includes a display unit that displays information related to operation of the main body side operation unit, and the control unit displays content displayed on the display unit according to a function assigned to the operation of the main body side operation unit. It is characterized by changing.

  As a result, the user can visually confirm the function assigned to the operation of the main body side operation unit on a display unit such as an LCD monitor, which may be confused even if a plurality of functions are assigned to the operation of the main body side operation unit. The convenience of zoom operation is improved. For example, when the electronic zoom function is assigned to the main body side operation unit, the electronic zoom magnification may be displayed in addition to the optical zoom zoom magnification.

  The camera body according to the tenth invention is characterized in that the control unit invalidates the display corresponding to the function in which the operation of the main body side operation unit is invalidated.

  As a result, the user can easily visually confirm on the display unit such as the LCD monitor that the operation of the operation unit on the main body side is invalid. There is nothing. For example, when a lens barrel that does not support electric zoom is attached to the camera body, the display on the main body side operation unit may be grayed out or deleted.

  A lens barrel according to an eleventh invention is attached to the camera body according to any one of the first to tenth inventions, and information on whether electric optical zoom is possible and the lens side for operating the optical zoom operation A storage unit that stores lens information including information on whether or not the zoom operation unit is provided is provided.

  Thereby, even when a different lens barrel is attached to the camera body, the camera body can acquire necessary lens information from the lens barrel.

  A camera system according to a twelfth aspect includes the camera body according to any one of the first to tenth aspects and the lens barrel according to the eleventh aspect.

  Accordingly, since necessary functions can be assigned to the operation unit on the camera body side in accordance with the lens barrel attached to the camera body, system conflicts can be avoided and the convenience of zoom operation can be improved.

  According to the present invention, when an interchangeable lens unit equipped with an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever, the convenience of zoom operation is improved without system failure. It is possible to provide a camera body, a lens barrel, and a camera system that can perform the above-described operation.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
<1: Overall configuration of camera system>
The overall configuration of the camera system 1 according to the first embodiment will be described with reference to FIGS. FIG. 1 shows a block diagram of the camera system 1. FIG. 2 shows a block diagram of the camera body 3. FIG. 3 shows a schematic configuration diagram of the camera body 3.

  As shown in FIG. 1, the camera system 1 is an interchangeable lens type digital single-lens reflex camera system. The camera system 1 mainly includes a camera body 3 having the main functions of the camera system 1 and is detachably attached to the camera body 3. And an interchangeable lens unit (lens barrel) 2. The interchangeable lens unit 2 is attached to a body mount 4 provided on the front surface of the camera body 3 via a lens mount 79.

(1.1: Camera body)
As shown in FIGS. 1 and 2, the camera body 3 mainly includes an imaging unit 71 that images a subject, and a body microcomputer (control unit) 10 as a body control unit that controls the operation of each unit such as the imaging unit 71. The image display unit 72 displays captured images and various information, the image storage unit 73 stores image data, and the viewfinder optical system 22 that visually recognizes the subject image.

  The imaging unit 71 mainly includes a quick return mirror 23 that guides incident light to the finder optical system 22 and the focus detection unit 5, an imaging sensor 11 such as a CCD (Charge Coupled Device) that performs photoelectric conversion, and an exposure state of the imaging sensor 11. A shutter unit 33 that adjusts the image, a shutter control unit 31 that controls driving of the shutter unit 33 based on a control signal from the body microcomputer 10, an image sensor drive control unit 12 that controls the operation of the image sensor 11, and a focus ( And a focus detection unit 5 for detecting the in-focus state of the subject image. The focus detection unit 5 performs focus detection by, for example, a general phase difference detection method. The focus detection method is either a phase difference detection method using the focus detection unit 5 described above or a contrast detection method based on an image signal output from the image sensor 11 depending on the use status of the camera system 1. Is used. In the case of the contrast detection method, the body microcomputer 10 obtains a contrast value and detects the focus. That is, it can be said that the body microcomputer 10 includes a contrast detection unit. This focus detection result is transmitted to the lens microcomputer 40 described later, and is used for driving the focus lens group (second lens group L2).

  The imaging sensor 11 is, for example, a CCD (Charge Coupled Device) sensor that converts an optical image formed by the imaging optical system L into an electrical signal. The image sensor 11 is driven and controlled by a timing signal generated by the image sensor drive control unit 12. The imaging sensor 11 may be a CMOS (Complementary Metal Oxide Semiconductor) sensor.

  The body microcomputer 10 is a control unit that controls the center of the camera body 3 and controls various sequences. Specifically, the body microcomputer 10 is equipped with a CPU, a ROM, and a RAM, and the body microcomputer 10 can realize various functions by reading a program stored in the ROM into the CPU. For example, the body microcomputer 10 acquires information essential for controlling the camera system 1 such as a function of detecting that the interchangeable lens unit 2 is attached to the camera body 3 or focal length information from the interchangeable lens unit 2. A function for controlling the operation of the interchangeable lens unit 2 is provided. Further, the body microcomputer 10 indicates whether or not the interchangeable lens unit 2 is compatible with electric zoom, and if the interchangeable lens unit 2 is compatible with electric zoom, information on whether or not the interchangeable lens unit 2 has a zoom operation lever. It has a function to acquire from the interchangeable lens unit 2. Furthermore, a function for determining whether or not the interchangeable lens unit 2 is compatible with moving image shooting, and a function for setting the operation of the image sensor 11 to the still image shooting mode and the moving image shooting mode via the image sensor drive control unit 12. You may have. As shown in FIG. 1, the body microcomputer 10 is connected to each part provided in the camera body 3.

  The body microcomputer 10 includes a power switch 25, a release button 30, a mode switching dial 26, a cross operation key (main body side operation unit) 27, a MENU setting button 28 and a SET button 29, a viewfinder switching button 34, a moving image shown in FIG. Each of the signals of the shooting operation buttons 35 can be received.

  Furthermore, as shown in FIG. 2, the memory 38 in the body microcomputer 10 stores various information related to the camera body 3. The main body information includes, for example, the model name for identifying the camera main body 3 such as the name of the manufacturer of the camera main body 3, the date of manufacture, the model number, the version of software installed in the body microcomputer 10 and information on firmware upgrade. Contains information about. Note that the memory 38 can store information transmitted from the lens microcomputer 40.

  The body microcomputer 10 controls the entire camera system such as the image sensor 11 in accordance with the operation of the release button 30 or the like. The body microcomputer 10 transmits a vertical synchronization signal to the timing generator. In parallel with this, the body microcomputer 10 generates an exposure synchronization signal based on the vertical synchronization signal. The body microcomputer 10 periodically and repeatedly transmits the generated exposure synchronization signal to the lens microcomputer 40 via the body mount 4 and the lens mount 79.

  The body microcomputer 10 assigns the function of the zoom operation lever to the cross operation key 27 and transmits a zoom operation signal based on the operation of the cross operation key to the lens microcomputer 40 via the body mount 4 and the lens mount 79. By sending a command from the lens microcomputer 40 to the zoom lens drive controller 61, the zoom lens group L1 of the interchangeable lens unit 2 can be moved to the telephoto side or the wide angle side. The assignment of the zoom operation lever function to the cross operation key 27 is automatically performed in the present embodiment as described later. The assignment of the zoom operation lever function to the cross operation key 27 is performed by operating the cross operation key 27, the MENU setting button 28, and the SET button 29 so that the assignment of the zoom operation lever function can be switched between valid and invalid. Also good. When the zoom operation lever function is assigned to the cross operation key 27, when the operation part 27a of the cross operation key 27 is operated in FIG. 3B, the body microcomputer 10 performs the zoom operation based on this operation. The signal is transmitted to the lens microcomputer 40 through the body mount 4 and the lens mount 79, and the zoom microcomputer L2 of the interchangeable lens unit 2 is moved to the telephoto side by sending a command from the lens microcomputer 40 to the zoom lens drive controller 61. Let On the other hand, when the operation part 27b of the cross operation key 27 is operated in FIG. 3B, the body microcomputer 10 sends a zoom operation signal to the lens microcomputer 40 via the body mount 4 and the lens mount 79 based on this operation. The zoom lens group L1 of the interchangeable lens unit 2 is moved to the wide-angle side by transmitting a command from the lens microcomputer 40 to the zoom lens drive control unit 61.

  The body mount 4 can be mechanically and electrically connected to the lens mount 79 of the interchangeable lens unit 2. The body mount 4 can transmit and receive data to and from the interchangeable lens unit 2 via the lens mount 79. For example, the body mount 4 transmits the exposure synchronization signal received from the body microcomputer 10 to the lens microcomputer 40 via the lens mount 79. The body mount 4 transmits other control signals received from the body microcomputer 10 to the lens microcomputer 40 via the lens mount 79. The body mount 4 transmits a signal received from the lens microcomputer 40 via the lens mount 79 to the body microcomputer 10. The body mount 4 supplies power supplied from a power supply unit (not shown) to the entire interchangeable lens unit 2 via the lens mount 79.

  As shown in FIG. 3, the housing 3a of the camera body 3 is supported by the user when photographing a subject. On the rear surface of the housing 3a, a display unit 20, a power switch 25, a mode switching dial 26, a cross operation key 27, a MENU setting button 28, a SET button 29, a finder switching button 34, and a video shooting operation are displayed. Button 35 is provided.

  The power switch 25 is a switch for turning on / off the power of the camera system 1 or the camera body 3. When the power is turned on by the power switch 25, power is supplied to each part of the camera body 3 and the interchangeable lens unit 2. The mode switching dial 26 is a dial for switching between a still image shooting mode, a moving image shooting mode, and a reproduction mode, and the user can switch the mode by rotating the mode switching dial 26. When the still image shooting mode is selected with the mode switching dial 26, the shooting mode can be switched to the still image shooting mode. When the moving image shooting mode is selected with the mode switching dial 26, the shooting mode is switched to the moving image shooting mode. be able to. In the movie shooting mode, movie shooting is basically possible. Further, when the playback mode is selected by the mode switching dial 26, the mode can be switched to the playback mode, and the captured image can be displayed on the display unit 20.

  The MENU setting button 28 is a button for setting various operations of the camera system 1. The cross operation key 27 is an operation member for the user to select a desired menu from various menu screens displayed on the display unit 20 by pressing the upper, lower, left, and right parts. The SET button 29 is a button for confirming execution of various menus. The finder switching button 34 is a button for switching between a finder photographing mode and a monitor photographing mode. The moving image shooting operation button 35 is a button for instructing start and stop of moving image shooting. Even when the shooting mode set in the mode switching dial 26 is the still image shooting mode or the playback mode, the moving image shooting operation button 35 is pressed. By pushing, the moving image shooting mode is forcibly started regardless of the setting contents in the mode switching dial 26. Further, when the moving image shooting operation button 35 is pressed in the moving image shooting mode, the moving image shooting is ended, and the mode is shifted to the still image shooting mode or the reproduction mode.

  As shown in FIG. 3B, a release button 30 is provided on the upper surface of the housing 3a. When the release button 30 is operated, a timing signal is output to the body microcomputer 10. The release button 30 is a two-stage switch that can be pressed halfway and fully. When the user presses the release button 30 halfway, photometric processing and distance measurement processing are started. Further, by this half-pressing operation, power is supplied to each part including the body microcomputer 10 and the lens microcomputer 40. Subsequently, when the user fully presses the release button 30, a timing signal is output to the body microcomputer 10. The shutter control unit 31 drives the shutter drive motor 32 and operates the shutter unit 33 according to the control signal output from the body microcomputer 10 that has received the timing signal.

  As shown in FIG. 2, in the still image shooting mode, the body microcomputer 10 that has received the timing signal by operating the release button 30 outputs a control signal to the strobe controller 47. Then, the strobe controller 47 causes the strobe 48 composed of LEDs or the like to emit light based on the control signal. The strobe 48 is controlled according to the amount of light received by the image sensor 11. That is, the strobe control unit 47 automatically emits light in conjunction with the shutter operation when the output of the image signal from the imaging sensor 11 is a predetermined value or less. On the other hand, when the output of the image signal is equal to or greater than a certain value, the strobe control unit 47 performs control so that the strobe 48 does not emit light.

  The strobe switch 49 is an operation unit for setting the operation of the strobe 48 regardless of the output of the imaging sensor 11 described above. That is, the strobe controller 47 causes the strobe 48 to emit light when the strobe switch 49 is “ON”, and does not cause the strobe 48 to emit light when it is “OFF”.

  Further, in the moving image shooting mode, the strobe 48 constituted by an LED or the like functions as a video light by operating the release button 30 or the moving image shooting operation button 35, and the light is directed toward the subject during moving image shooting. Irradiate.

  The image signal (still image or moving image) output from the image sensor 11 is sequentially transferred from the analog signal processing unit 13 to the A / D conversion unit 14, the digital signal processing unit 15, the buffer memory 16, and the image compression unit 17. Sent and processed. The analog signal processing unit 13 performs analog signal processing such as gamma processing on the image signal output from the imaging sensor 11. The A / D conversion unit 14 converts the analog signal output from the analog signal processing unit 13 into a digital signal. The digital signal processing unit 15 performs digital signal processing such as noise removal and edge enhancement on the image signal converted into a digital signal by the A / D conversion unit 14. The buffer memory 16 is a RAM and temporarily stores an image signal.

  The image signals stored in the buffer memory 16 are sequentially sent from the image compression unit 17 to the image recording unit 18 for processing. The image signal stored in the buffer memory 16 is read by a command from the image recording control unit 19 and transmitted to the image compression unit 17. The image signal data transmitted to the image compression unit 17 is compressed in accordance with a command from the image recording control unit 19. The image signal has a smaller data size than the original data by this compression processing. As such a compression method, in the case of a still image, for example, a JPEG (Joint Photographic Experts Group) method is used. In the case of moving images, for example, a moving picture experts group (MPEG) method is used. The compressed image signal is recorded in the image recording unit 18 by the image recording control unit 19.

  In addition, the digital signal processing unit 15 has an electronic zoom function for storing an image signal obtained by cutting out a part near the center of the imaging sensor 11 in the buffer memory 16 in accordance with an instruction from the body microcomputer 10. In the state where the function of the zoom operation lever is assigned to the cross operation key 27, the electronic zoom function is realized by changing the area of the cutout area of the image sensor 11 according to the zoom magnification by the operation of the cross operation key 27. When the zoom magnification is changed to the telephoto side by operating the cross operation key 27, the area of the cutout area of the image sensor 11 is reduced, and when the zoom magnification is changed to the wide angle side, the area of the cutout area of the image sensor 11 is reduced. Enlarge.

  The image recording unit 18 is, for example, an internal memory and / or a removable memory that records an image signal in association with predetermined information to be recorded based on a command from the image recording control unit 19. Note that the predetermined information to be recorded together with the image signal includes date and time when the image was captured, focal length information, shutter speed information, aperture value information, shooting mode information, and the like. The format of these information is, for example, a format similar to the Exif (registered trademark) format or the Exif (registered trademark) format.

  The display unit 20 is a liquid crystal monitor, for example, and displays an image signal recorded in the image recording unit 18 or the buffer memory 16 as a visible image based on a command from the image display control unit 21. Here, the display form of the display unit 20 includes a display form in which only an image signal is displayed as a visible image, and a display form in which the image signal and information at the time of shooting are displayed as a visible image. The display unit 20 may be a variable angle monitor that can freely change the angle with respect to the housing 3 a of the camera body 3.

  As shown in FIG. 1, the quick return mirror 23 includes a main mirror 23a that can reflect and transmit incident light, and a sub mirror 23b that is provided on the back side of the main mirror 23a and reflects transmitted light from the main mirror 23a. The quick return mirror control unit 36 can be flipped up outside the optical axis AZ. The incident light is divided into two light beams by the main mirror 23 a, and the reflected light beam is guided to the finder optical system 22. On the other hand, the transmitted light beam is reflected by the sub mirror 23 b and used as the AF light beam of the focus detection unit 5. During normal shooting, the quick return mirror control unit 36 causes the quick return mirror 23 to jump up outside the optical axis AZ, and the shutter unit 33 is opened to form a subject image on the imaging surface of the imaging sensor 11. . When not photographing, the quick return mirror 23 is disposed on the optical axis AZ as shown in FIG. 1, and the shutter unit 33 is closed.

  The finder optical system 22 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 the user It is composed of a finder eyepiece window 9 for observing an image.

(1.2: Interchangeable lens unit)
As shown in FIG. 1, the interchangeable lens unit 2 mainly includes an imaging optical system L for connecting a subject image to the imaging sensor 11 in the camera system 1, a zoom lens drive control unit 61 that changes the imaging magnification, and focusing. And a lens microcomputer 40 as a lens control unit for controlling the operation of the interchangeable lens unit 2.

  The zoom lens drive control unit 61 drives and controls a first lens group (hereinafter also referred to as a zoom lens group) L1 that adjusts the photographing magnification to the telephoto side or the wide angle side. The focus lens group drive control unit 41 mainly drives and controls a later-described second lens group (hereinafter also referred to as a focus lens group) L2 that adjusts the focus. The aperture drive control unit 42 controls the drive of the aperture unit 43 that mainly adjusts the aperture or opening.

  The lens microcomputer 40 is a control device that controls the center of the interchangeable lens unit 2, and is connected to each part mounted on the interchangeable lens unit 2. Specifically, the lens microcomputer 40 is equipped with a CPU, a ROM, and a RAM, and various functions can be realized by reading a program stored in the ROM into the CPU. In addition, the body microcomputer 10 and the lens microcomputer 40 are electrically connected via an electrical section (not shown) provided in the lens mount 79, so that information can be transmitted and received between them.

  Further, the interchangeable lens unit 2 has a zoom operation lever (lens side zoom operation unit) 64 and a zoom operation lever detection unit 65. The zoom operation lever 64 is a lever for adjusting the zoom magnification to the telephoto side or the wide angle side by operating the lever. By operating the zoom operation lever 64, the zoom operation lever detector 65 detects that the operation is performed on the telephoto side or the wide angle side, and transmits the operation information to the lens microcomputer 40. When the lens microcomputer 40 detects that the operation information is operated to the telephoto side, the lens microcomputer 40 moves and controls the zoom lens group L1 to the telephoto side via the zoom lens drive control unit 61. On the other hand, when the lens microcomputer 40 detects that the operation information is operated on the wide angle side, the zoom lens group L1 is moved and controlled to the wide angle side via the zoom lens drive control unit 61. Furthermore, information regarding the zoom magnification and focal length that change in accordance with the movement of the zoom lens group L1 is transmitted from the lens microcomputer 40 to the body microcomputer 10 via the lens mount 79 and the body mount 4. Based on this information, information related to the zoom magnification is displayed on the display unit 20 as will be described later, focal length information is recorded at the same time as an image taken on Exif (registered trademark), or the magnification of the electronic zoom is changed. It is configured to

  The memory 44 in the lens microcomputer 40 stores various information (lens information) related to the interchangeable lens unit 2. Specific contents of the various information will be described later. The various information stored in the memory 44 is sent to the camera body 3 when the interchangeable lens unit 2 is attached to the camera body 3 for use during shooting.

(1.3: Information on interchangeable lens units)
Here, information regarding the interchangeable lens unit 2 will be described. Various information (lens information) about the interchangeable lens unit 2 is stored in the memory 44 in the lens microcomputer 40. Specifically, focal length information indicating the maximum value and minimum value (focal length variable range) of the interchangeable lens unit 2, object point distance information, or the like is stored in the memory 44.

  Further, the memory 44 stores information regarding whether or not the interchangeable lens unit 2 is compatible with the above-described moving image shooting. This information is recorded at a predetermined address in the memory 44 (for example, a spare address that is not normally used).

  As a criterion for determining whether or not the interchangeable lens unit 2 is compatible with moving image shooting, for example, it is conceivable whether or not the second lens group L2 as the focus lens group is capable of wobbling (micro reciprocating vibration). If the second lens unit L2 is supported by a guide pole and the second lens unit L2 is directly driven by an ultrasonic actuator or the like, it can be determined that wobbling is possible. Accordingly, a driving method of the second lens unit L2 is also conceivable as information regarding whether or not the interchangeable lens unit 2 is compatible with moving image shooting.

  Furthermore, when the focus lens group is wobbled, a configuration in which the magnification change amount of the image on the image sensor 11 is equal to or less than a predetermined value can also be a criterion for determining whether or not movie shooting is supported. For this reason, such information is also conceivable as information regarding whether or not the interchangeable lens unit 2 is compatible with moving image shooting.

  In addition, being able to handle moving image shooting means that the interchangeable lens unit 2 is compatible with a contrast detection method. Therefore, as information regarding whether or not the interchangeable lens unit 2 is compatible with moving image shooting, information regarding whether or not the contrast detection method can be considered is also conceivable.

  Further, information regarding whether or not the interchangeable lens unit 2 supports electric zoom and information regarding whether or not it has a zoom operation lever are also stored in the memory 44. The case corresponding to the electric zoom is a case where the zoom lens group L1 is configured to be moved and controlled by the zoom lens drive control unit 61. The zoom lens group L1 may be driven by a stepping motor, a DC motor, an electromagnetic linear motor, an ultrasonic motor, or the like. The zoom lens drive control unit 61 supplies power to these actuators and actuators for speed or position control. It consists of the circuit which performs. The zoom operation lever is a lever that can detect the operation state of the zoom operation lever and electrically control the movement of the zoom lens group L1 using the actuator as described above.

  When these pieces of information are stored in the interchangeable lens unit 2, when the interchangeable lens unit 2 is attached to the camera body 3, these pieces of information are acquired by the body microcomputer 10 on the camera body 3 side, It is determined whether or not photographing is possible, whether or not the electronic zoom is supported, and whether or not a zoom operation lever is provided. Further, the focus speed, minimum resolution, and the like may be individually stored according to the performance of the focus lens group driving actuator such as an ultrasonic actuator, and the optimum focus performance may be set in combination with the camera body 3. For example, according to the focus performance, the camera system 1 can automatically set the frame rate (30 fps, 60 fps, etc.) at the time of moving image shooting, the number of recording pixels, and the like.

  These pieces of information are transmitted from the lens microcomputer 40 to the body microcomputer 10 when the interchangeable lens unit 2 is attached to the camera body 3. Thereby, the body microcomputer 10 can grasp various information of the interchangeable lens unit 2.

<2: Operation of the camera system>
Hereinafter, the photographing operation of the camera system 1 configured as described above will be described.

  4 and 5 are conceptual diagrams at the time of imaging with the camera system 1. FIG. 4 is a diagram for explaining the finder photographing mode, and FIG. 5 is a diagram for explaining the monitor photographing mode (image display photographing mode).

(2.1: State before imaging)
As shown in FIGS. 1, 4 and 5, light from a subject (not shown) passes through the interchangeable lens unit 2 and enters a main mirror 23a which is a semi-transmissive mirror. A part of the light incident on the main mirror 23a is reflected and incident on the finder screen 6, and the remaining light is transmitted and incident on the sub mirror 23b. 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 user can observe an erect image of the subject through the finder eyepiece window 9. Further, the light incident on the sub mirror 23 b is reflected and enters the focus detection unit 5.

(2.2: Viewfinder shooting mode and monitor shooting mode)
The camera system 1 has two shooting modes, that is, a finder shooting mode and a monitor shooting mode. The viewfinder shooting mode is a mode in which the user takes a picture while observing the viewfinder eyepiece window 9, and is a normal shooting mode in a conventional single-lens reflex camera. The monitor photographing mode is a mode in which a user photographs while observing the display unit 20 such as a liquid crystal monitor.

  In the finder photographing mode, as shown in FIG. 4, the quick return mirror 23 is disposed at a predetermined position in the optical axis AZ, and the subject light is guided to the finder optical system 22, so that the user can view the finder eyepiece. A subject image can be observed from the window 9. During actual photographing, the quick return mirror 23 is flipped up outside the optical axis AZ, and the shutter unit 33 is opened to form a subject image on the imaging surface of the imaging sensor 11.

  On the other hand, in the monitor photographing mode, the quick return mirror 23 is retracted from the optical axis AZ as shown in FIG. Therefore, an image of the subject, a so-called through image, is displayed on the display unit 20 via the imaging sensor 11.

(2.3: Operation in viewfinder shooting mode)
The shooting operation of the camera system 1 will be described. A driving sequence in the finder photographing mode in which the user shoots through the finder eyepiece window 9 will be described with reference to FIGS.

  When shooting in the finder shooting mode, the user operates the finder switching button 34 provided on the back surface of the housing 3a to select the finder shooting mode as the shooting mode.

  When the user presses the release button 30 halfway, power is supplied to the body microcomputer 10 and various units in the camera system 1. The body microcomputer 10 in the camera system 1 that is activated by power supply receives various lens data from the lens microcomputer 40 in the interchangeable lens unit 2 that is also activated by power supply via the lens mount 79 and the body mount 4, and is built in. Is stored in the memory 38. Next, the body microcomputer 10 acquires a defocus amount (hereinafter referred to as Df amount) from the focus detection unit 5 and instructs the lens microcomputer 40 to drive the focus lens group L2 by the Df amount. The lens microcomputer 40 controls the focus lens group drive control unit 41 to operate the second lens group L2 by the amount of Df. As described above, while the focus detection and the driving of the second lens group L2 are repeated, the Df amount becomes small, and when it becomes equal to or less than the predetermined amount, the body microcomputer 10 determines that it is in focus, and the second lens group L2 is driven. Is stopped.

  Thereafter, when the release button 30 is fully pressed by the user, the body microcomputer 10 instructs the lens microcomputer 40 to set the aperture value to an aperture value calculated based on an output from a photometric sensor (not shown). . Then, the lens microcomputer 40 controls the aperture drive control unit 42 to narrow the aperture to the instructed aperture value. Simultaneously with the aperture value instruction, the body microcomputer 10 causes the quick return mirror controller 36 to retract the quick return mirror 23 from the optical axis AZ. After the retraction of the quick return mirror 23 is completed, the imaging sensor drive control unit 12 instructs to drive the imaging sensor 11 and instructs the operation of the shutter unit 33. The image sensor drive control unit 12 exposes the image sensor 11 for the time of the shutter speed calculated based on an output from a photometric sensor (not shown).

  After the exposure is completed, the image data read from the image sensor 11 by the image sensor drive control unit 12 is displayed as a captured image on the display unit 20 after executing predetermined image processing. The image data read from the image sensor 11 and subjected to predetermined image processing is written as image data in a storage medium via the image recording unit 18. Further, after the exposure is completed, the quick return mirror 23 and the shutter unit 33 are reset to the initial positions. The body microcomputer 10 instructs the lens microcomputer 40 to reset the aperture to the open position, and the lens microcomputer 40 issues a reset command to each unit. After the reset is completed, the lens microcomputer 40 notifies the reset to the body microcomputer 10. The body microcomputer 10 waits for the reset completion information from the lens microcomputer 40 and the completion of the series of processes after exposure, and then confirms that the state of the release button 30 is not depressed and ends the photographing sequence. .

(2.4: Monitor shooting mode operation)
Next, a drive sequence in the monitor photographing mode in which the user photographs using the display unit 20 will be described with reference to FIGS. 1 to 3 and FIG.

  When shooting using the display unit 20, the user operates the finder switching button 34 to select the monitor shooting mode. When the monitor photographing mode is set, the body microcomputer 10 retracts the quick return mirror 23 from the optical axis AZ. Thereby, light from the subject reaches the image sensor 11. The imaging sensor 11 can convert light from a subject imaged on the imaging sensor 11 into image data, obtain it as image data, and output it. Image data read from the imaging sensor 11 by the imaging sensor drive control unit 12 is displayed as a captured image on the display unit 20 after predetermined image processing is executed. In this way, by displaying the captured image on the display unit 20, the user can follow the subject without looking through the viewfinder eyepiece window 9.

  As for the monitor photographing mode, when the moving image photographing mode is selected by the mode switching dial 26, the monitor photographing mode is automatically shifted to the monitor photographing mode. Further, when the moving image shooting operation button 35 is pressed, the monitor shooting mode is automatically entered. Further, in a camera such as an LCD monitor in which the display unit 20 is openable / closable, when the user opens the display unit 20, the monitor photographing mode may be automatically shifted.

  In this monitor photographing mode, as a focusing method, contrast type autofocus is used based on image data generated by the image sensor 11 instead of the phase difference detection method using the focus detection unit 5. By using a contrast method as a method of autofocus operation in the monitor photographing mode using the display unit 20, a highly accurate focus operation can be realized as a camera system. In this monitor photographing mode, since image data is constantly generated by the image sensor 11, it is easier to perform a contrast-type autofocus operation using the image data than in the conventional phase difference detection method. is there.

  Here, the autofocus operation using the contrast method will be described.

  When performing the contrast autofocus operation, the body microcomputer 10 requests the lens microcomputer 40 for data for contrast AF. The contrast AF data is necessary for the contrast autofocus operation, and includes, for example, a focus drive speed, a focus shift amount, an image magnification, and contrast AF availability information.

  The body microcomputer 10 periodically generates a vertical synchronization signal. In parallel with this, the body microcomputer 10 generates an exposure synchronization signal based on the vertical synchronization signal. This is because the body microcomputer 10 knows in advance the exposure start timing and the exposure end timing with reference to the vertical synchronization signal, so that the exposure synchronization signal can be generated. The body microcomputer 10 outputs a vertical synchronization signal to a timing generator (not shown) and outputs an exposure synchronization signal to the lens microcomputer 40. The lens microcomputer 40 acquires position information of the second lens group L2 in synchronization with the exposure synchronization signal.

  The image sensor drive control unit 12 periodically generates a readout signal and an electronic shutter drive signal from the image sensor 11 based on the vertical synchronization signal. The image sensor drive control unit 12 drives the image sensor 11 based on the readout signal and the electronic shutter drive signal. That is, the imaging sensor 11 reads out pixel data generated by a large number of photoelectric conversion elements (not shown) in the imaging sensor 11 to a vertical transfer unit (not shown) in accordance with the readout signal.

  In the still image shooting mode, the body microcomputer 10 of the camera system 1 is moved from the lens microcomputer 40 in the interchangeable lens unit 2 via the lens mount 79 and the body mount 4 by the user's half-pressing operation of the release button 30. Various lens data are received and stored in the built-in memory 38. The body microcomputer 10 transmits an autofocus start command to the lens microcomputer 40. When the release button 30 is pressed halfway, the autofocus start command is a command indicating that the contrast type autofocus operation is started. Based on this command, the lens microcomputer 40 drives and controls the second lens group L2 in the direction along the optical axis AZ. The body microcomputer 10 calculates an evaluation value for autofocus operation (hereinafter referred to as AF evaluation value) based on the received image data. Specifically, a method is known in which a luminance signal is obtained from image data generated by the image sensor 11, and high-frequency components in the screen of the luminance signal are integrated to obtain an AF evaluation value. The calculated AF evaluation value is stored in a DRAM (not shown) in a state associated with the exposure synchronization signal. The lens position information acquired from the lens microcomputer 40 is also associated with the exposure synchronization signal. Therefore, the body microcomputer 10 can store the AF evaluation value in association with the lens position information.

  Next, the body microcomputer 10 obtains a contrast peak based on the AF evaluation value stored in the DRAM and monitors whether or not the in-focus point has been extracted. Specifically, the position of the second lens unit L2 at which the AF evaluation value is a maximum value is extracted as the focal point. As this lens driving method, a hill-climbing method is generally known.

  In this state, the camera system 1 displays the image indicated by the image data generated by the imaging sensor 11 on the display unit 20 as a through image. Since the through image is displayed as a moving image on the display unit 20, the user can determine a composition for capturing a still image while viewing the display unit 20.

  Thereafter, when the release button 30 is fully pressed by the user, the body microcomputer 10 instructs the lens microcomputer 40 to set the aperture value to the aperture value calculated based on the output from the photometric sensor (not shown). To do. Then, the lens microcomputer 40 controls the aperture drive control unit 42 to narrow the aperture to the instructed aperture value. The imaging sensor drive control unit 12 instructs driving of the imaging sensor 11 and instructs the operation of the shutter unit 33. Note that the imaging sensor drive control unit 12 exposes the imaging sensor 11 for a predetermined shutter speed time calculated from the output of the imaging sensor 11.

  After the exposure is completed, the image data read from the image sensor 11 by the image sensor drive control unit 12 is displayed as a captured image on the display unit 20 after executing predetermined image processing. The image data read from the image sensor 11 and subjected to predetermined image processing is written as image data in a storage medium via the image recording unit 18. Moreover, since the quick return mirror 23 is located in the state retracted from the optical axis AZ after the exposure is completed, the user can continuously view the subject as a captured image on the display unit 20 in the monitor imaging mode. it can.

  Similarly, in the moving image shooting mode, moving image recording can be performed by the user's full pressing operation of the release button 30. In any mode, the moving image recording operation button 35 can be pressed to record a moving image. Furthermore, when the interchangeable lens unit 2 is compatible with moving image shooting, when the interchangeable lens unit 2 is attached to the camera body 3, it may be automatically shifted to the moving image shooting mode.

  Further, when canceling the monitor photographing mode, the user operates the finder switching button 34 to shift to the finder photographing mode in which the photographing is performed while looking through the finder eyepiece window 9. When the mode is switched to the finder photographing mode, the quick return mirror 23 is returned to a predetermined position in the optical axis AZ. Also, when the power source of the camera system 1 is turned off, the quick return mirror 23 is returned to a predetermined position in the optical axis AZ.

(2.5: Zoom operation function selection operation)
Next, a method for selecting a zoom operation function when various interchangeable lens units 2 are attached to the camera body will be described with reference to FIG. FIG. 6 is a flowchart showing a procedure for selecting a zoom function. As shown in FIG. 6, first, the body microcomputer 10 of the camera body 3 determines whether or not the interchangeable lens unit 2 is attached (step S1). When it is determined that the interchangeable lens unit 2 is attached, lens information stored in the memory 44 of the interchangeable lens unit 2 is acquired from the body microcomputer 10 (step S2). Based on the acquired lens information, the body microcomputer 10 determines whether or not the interchangeable lens unit 2 is compatible with the electric zoom function (step S3).

  If the interchangeable lens unit 2 is compatible with the electric zoom function, the zoom operation function is assigned to the cross operation key 27 (step S4). Next, it is displayed that the electric zoom operation is effective (step S5). Here, as shown in FIG. 7A, the function of changing the zoom magnification in the wide-angle side (W) direction is assigned to the operation of the operation portion 27a of the cross operation key 27, and the display state 20a of the display unit 20 is assigned. As shown, the operation direction toward the wide angle side (W) is indicated by a button-shaped display. On the other hand, a function for changing the zoom magnification in the direction of the telephoto side (T) is assigned to the operation of the operation part 27b of the cross operation key 27, and the operation to the telephoto side (T) is performed as shown in the display state 20a of the display unit 20. The button shape indicating the direction is indicated by highlighting.

  If the interchangeable lens unit 2 does not support the electric zoom function, the assignment of the zoom operation function to the cross operation key 27 is invalidated (step S6). Next, it is displayed that the electric zoom operation is invalid (step S7). Here, the zoom operation function selection process is terminated. Here, as shown in FIG. 7B, the zoom operation function of the cross operation key 27 is disabled, so that the wide angle side (W) and the telephoto side (T) are displayed as shown in the display state 20b of the display unit 20. The button shape indicating the operation direction to) is grayed out (unusable display).

  In the process of S7, the fact that the zoom operation function is invalid is displayed, but it may be hidden.

  Next, in the case of the interchangeable lens unit 2 corresponding to the electric zoom, a determination process is performed to determine whether or not the interchangeable lens unit 2 has a zoom operation lever (step S8). If the interchangeable lens unit 2 does not have a zoom operation lever, the zoom operation function selection process is terminated. If the interchangeable lens unit 2 has a zoom operation lever, the zoom operation lever is validated (step S9). Specifically, as described above, by operating the zoom operation lever 64, the zoom operation lever detection unit 65 detects that the operation is performed on the telephoto side or the wide angle side, and the lens microcomputer 40 performs the operation. Communicate information. When the lens microcomputer 40 detects that the operation information is operated to the telephoto side, the lens microcomputer 40 moves and controls the zoom lens group L1 to the telephoto side via the zoom lens drive control unit 61. On the other hand, when the lens microcomputer 40 detects that the operation information is operated on the wide angle side, the zoom lens group L1 is moved and controlled to the wide angle side via the zoom lens drive control unit 61. Furthermore, information regarding the zoom magnification and focal length that change in accordance with the movement of the zoom lens group L1 is transmitted from the lens microcomputer 40 to the body microcomputer 10 via the lens mount 79 and the body mount 4. Based on this information, information related to the zoom magnification is displayed on the display unit 20 as will be described later, focal length information is recorded at the same time as an image taken on Exif (registered trademark), or the magnification of the electronic zoom is changed. It is configured to

(2.6: Electronic zoom operation function selection operation)
Next, the electronic zoom operation selection operation will be described. Here, an example in which an interchangeable lens unit corresponding to electric zoom and having a zoom operation lever is attached to the camera body will be described with reference to FIG. First, the user operates the finder switching button 34 provided on the rear surface of the housing 3a to shoot as a finder shooting mode (hereinafter also referred to as an EVF mode), or a monitor shooting mode (hereinafter referred to as an LCD mode). The case of shooting is selected (step S11). If the EVF mode is selected, the process proceeds to step S12. On the other hand, if the LCD mode is selected, the process proceeds to step S14.

  When the EVF mode is selected, the electronic zoom operation is invalidated (step S12). Next, it is displayed that the electronic zoom is invalid (step S13). Here, as shown in the display state 20c of FIG. 9A, the gauge display is shown while the current zoom magnification is indicated by P with respect to the wide-angle (W) or telephoto (T) gauge display. The area on the further right side (indicated by a broken line) of the telephoto side (T) of FIG. 4 indicates an electronic zoom area, but it is invalid to further increase the zoom magnification by shifting the zoom magnification to the electronic zoom area.

  On the other hand, when the LCD mode is selected, the electronic zoom operation is validated (step S14). Next, the fact that the electronic zoom is effective is displayed (step S15). Here, as shown in the display state 20d of FIG. 9B, the gauge display is shown while the current zoom magnification is indicated by P with respect to the wide-angle side (W) or telephoto side (T) gauge display. The area further to the right of the telephoto side (T) (the area 20e) indicates an electronic zoom area, and it is effective to shift the zoom magnification to the electronic zoom area and further increase the zoom magnification.

  In the case of the EVF mode, as described above, the user uses the electronic zoom function of cutting out a part of the imaging area of the imaging sensor 11 and performing digital processing in order to observe the subject image from the viewfinder eyepiece window 9. Can not do it. Therefore, as described above, the electronic zoom function is disabled in the EVF mode. On the other hand, in the case of the LCD mode, as described above, since the user observes the subject image using the display unit 20, the electronic zoom function that performs digital processing by cutting out a part of the imaging area of the imaging sensor. Can be used. Therefore, as described above, the electronic zoom function is enabled in the LCD mode.

(2.7: Selection operation of the zoom operation lever on the lens side and the zoom operation key on the main unit side)
Here, the selection operation of the zoom operation keys on the lens side and the camera body when the interchangeable lens unit 2 corresponding to the electric zoom and having the zoom operation lever is attached to the camera body 3 will be described.

  When the user changes the zoom magnification, the zoom operation lever 64 mounted on the interchangeable lens unit 2 is operated to change the zoom magnification, and the cross operation key 27 (zoom operation function assignment) mounted on the camera body 3 The zoom magnification may be changed by operating. At this time, when both zoom operation levers or operation keys are operated at the same time, the zoom functions compete and the system breaks down. Therefore, a method for stably operating the zoom operation function without causing the zoom function to fail even when both zoom operation levers or operation keys are operated simultaneously will be described below.

  First, a case where priority is given to the cross operation key 27 mounted on the camera body 3 will be described with reference to FIG. As shown in FIG. 10, first, it is determined whether or not the zoom operation with the cross operation key 27 is performed by the body microcomputer 10 of the camera body 3 (step S21). When it is determined that the zoom operation with the cross operation key 27 is performed, the optical zoom operation is performed by the zoom operation with the cross operation key 27 (step S23). Thereafter, the process returns to step S21, but the zoom operation with the cross operation key 27 is continued by the user (the operation key is kept pressed or once the operation key is pressed, the zoom lens is zoomed to a predetermined zoom magnification. In the case where the group L1 continues to move), the processes of steps S21 and S23 are repeated. This series of processing is executed by, for example, loop processing that is processed at intervals of 1 ms.

  If it is determined in step S21 that the zoom operation with the cross operation key 27 is not performed, whether or not the zoom operation with the zoom operation lever 64 mounted on the interchangeable lens unit 2 is performed. Is determined (step S22). If it is detected that the zoom operation with the zoom operation lever 64 is being performed, the optical zoom operation is performed by the zoom operation with the zoom operation lever 64 (step S24). Thereafter, the process returns to the process of step S21. However, the zoom operation with the zoom operation lever 64, not the cross operation key 27, is continued by the user (the operation lever is kept pressed or once the operation lever is pressed). In the case where the zoom lens group L1 continues to be moved to a predetermined zoom magnification), the processes of steps S21, S22, and S24 are repeated. This series of processing is executed by, for example, loop processing that is processed at intervals of 1 ms.

  If it is determined in step S22 that the zoom operation with the zoom operation lever 64 has not been performed, that is, neither the cross operation key 27 nor the zoom operation lever 64 has been operated, the optical zoom operation is performed. Stop (step S25). As described above, once the cross operation key 27 to which the zoom operation function is assigned or the zoom operation lever 64 is pressed, the process is completed when the zoom lens group L1 is continuously moved to a predetermined zoom magnification. Until then, an exception process for continuing the zoom operation may be executed. Even when the processes of steps S21, S22, and S25 are repeated, this series of processes is executed in a loop process that is processed at intervals of 1 ms, for example.

  As explained with reference to FIG. 10, when the user changes the zoom magnification, the zoom operation lever 64 mounted on the interchangeable lens unit 2 is operated to change the zoom magnification, and the camera is mounted on the camera body 3. Even when the cross control key 27 (zoom operation function assignment) is operated to change the zoom magnification, both zoom operation levers or operation keys can be operated simultaneously without causing the lens and body zoom operation functions to conflict. Even when operated, the zoom operation function can be stably operated. In particular, here, the case where the cross operation key 27 (assignment of the zoom operation function) mounted on the camera body 3 is preferentially operated for zoom operation has been described. Accordingly, during the zoom operation with the cross operation key 27, even if the zoom operation with the zoom operation lever 64 of the interchangeable lens unit 2 is performed, the operation of the cross operation key 27 has priority.

  Next, a case where priority is given to the zoom operation lever 64 mounted on the interchangeable lens unit 2 will be described with reference to FIG. As shown in FIG. 11, first, it is determined whether or not the zoom operation with the zoom operation lever 64 of the interchangeable lens unit 2 is performed by the body microcomputer 10 of the camera body 3 (step S31). When it is determined that the zoom operation with the zoom operation lever 64 is being performed, the optical zoom operation is performed by the zoom operation with the zoom operation lever 64 (step S33). Thereafter, the process returns to the process of step S31. However, the zoom operation with the zoom operation lever 64 is continued by the user (the operation lever is kept pressed, or once the operation lever is pressed, the zoom lens reaches a predetermined zoom magnification). In the case where the group L1 is continuously moved), the processes of steps S31 and S33 are repeated. This series of processing is executed by, for example, loop processing that is processed at intervals of 1 ms.

  If it is determined in step S31 that the zoom operation with the zoom operation lever 64 is not performed, the zoom operation with the cross operation key 27 (assignment of the zoom operation function) mounted on the camera body 3 is performed. It is determined whether or not it is broken (step S32). When it is detected that the zoom operation with the cross operation key 27 is performed, the optical zoom operation is performed by the zoom operation with the cross operation key 27 (step S34). Thereafter, the process returns to the process of step S31. However, the zoom operation with the cross operation key 27, not the zoom operation lever 64, is continued by the user (the operation lever is kept pressed or once the operation lever is pressed). In the case where the zoom lens group L1 continues to be moved to a predetermined zoom magnification), the processes of steps S31, S32, and S34 are repeated. This series of processing is executed by, for example, loop processing that is processed at intervals of 1 ms.

  If it is determined in step S32 that the zoom operation with the cross operation key 27 is not performed, that is, neither the cross operation key 27 nor the zoom operation lever 64 is operated, the optical zoom operation is performed. Stop (step S35). As described above, once the cross operation key 27 to which the zoom operation function is assigned or the zoom operation lever 64 is pressed, the process is completed when the zoom lens group L1 is continuously moved to a predetermined zoom magnification. Until then, an exception process for continuing the zoom operation may be executed. Even when the processes of steps S31, S32, and S35 are repeated, this series of processes is executed in a loop process that is processed at intervals of 1 ms, for example.

  As described with reference to FIG. 11, when the user changes the zoom magnification, the zoom operation lever 64 mounted on the interchangeable lens unit 2 is operated to change the zoom magnification, and the camera is mounted on the camera body 3. Even when the zoom magnification is changed by operating the cross control key 27 (zoom operation function assignment), the zoom operation levers or keys on both sides are operated at the same time without conflict between the zoom operation functions on the lens side and the body side. Even in this case, the zoom operation function can be stably operated. In particular, here, the case where the zoom operation key 64 mounted on the interchangeable lens unit 2 is preferentially operated for zoom operation has been described. Therefore, during the zoom operation with the zoom operation lever 64 of the interchangeable lens unit 2, even if the zoom operation is performed with the cross operation key 27 (assignment of the zoom operation function) of the camera body 3, the operation of the zoom operation lever 64 has priority.

  As described above, when the interchangeable lens unit 2 having the electric zoom function and having the zoom operation lever is connected to the camera body 3 having the zoom operation lever, the camera body 3 side zoom operation unit and the lens side zoom operation are performed. By making one of these units function as a zoom operation member for optical zoom, giving priority to the previously operated operation unit, the zoom operation lever can compete and the convenience of zoom operation can be reduced without breaking the system. Can be improved.

(2.8: Zoom operation and focus operation)
Next, the operation of the interchangeable lens unit 2 when the user performs the zoom operation and the focus operation will be described with reference to FIGS.

  As shown in FIG. 12, when the zoom operation lever 64 is operated by the user, the zoom operation lever 64 is zoomed to the telephoto side (64T) or zoomed to the wide angle side (64W) by the zoom operation lever detector 65. When the lens microcomputer 40 is zoomed to the telephoto side (64T) based on the detection result, the zoom lens group L1 is moved and controlled to the telephoto side via the zoom lens drive control unit 61. When the zoom operation is performed to the wide angle side (64 W), the zoom lens group L1 is controlled to move to the wide angle side via the zoom lens drive control unit 61.

  When the focus ring 67 is rotated by the user, the rotation angle detection unit 68 detects the rotation angle of the focus ring 67 and outputs a signal corresponding to the rotation angle. The lens microcomputer 40 transmits a drive signal for driving the focus lens group L2 to the focus lens group drive control unit 41 based on the focus ring rotation angle signal. When the rotation angle detection unit 68 detects that the rotation direction of the focus ring 67 has been rotated to infinity, the lens microcomputer 40 performs focusing via the focus lens group drive control unit 41 based on the detection result. The lens group L2 is moved and controlled to the infinity side. When the rotation angle detection unit 68 detects that the rotation direction of the focus ring 67 has been rotated to the nearest side, the lens microcomputer 40 uses the focus lens group drive control unit 41 based on this detection result to detect the focus lens. The group L2 is moved and controlled to the closest side.

  Note that the lens side operation unit for the zoom operation may be a zoom ring 69 having a rotational structure similar to the focus ring 67 as shown in FIG. The operation of the zoom ring 69 will be described with reference to FIGS. FIG. 14 is a block diagram of a camera system equipped with an interchangeable lens unit in which the zoom ring 69 is mounted as a lens side operation unit. In this case, the rotation direction and rotation angle of the zoom ring 69 are detected by the zoom ring rotation angle detector 70. The lens microcomputer 40 controls the movement of the zoom lens group L1 via the zoom lens drive control unit 61 based on the detection result. As shown in FIG. 13, when the zoom ring 69 is operated by the user, the zoom ring rotation angle detector 70 detects the rotation direction and rotation angle of whether the zoom ring 69 has rotated to the telephoto side or to the wide angle side. The lens microcomputer 40 controls the movement of the zoom lens group L1 to the telephoto side via the zoom lens drive control unit 61 when rotated to the telephoto side based on this detection result, and when rotated to the wide angle side via the zoom lens drive control unit 61. The zoom lens group L1 is controlled to move to the wide-angle side via the zoom lens drive control unit 61. 13 and FIG. 14 are the same as those in FIG. 12 and FIG. 1, respectively, and the corresponding components are denoted by the same reference numerals and description thereof is omitted.

(2.9: Focusing operation)
Next, the focus operation of the camera system 1 will be described. The camera system 1 has two focus modes, an autofocus shooting mode and a manual shooting mode.

  The user sets a predetermined shooting mode using an auto shooting mode or manual shooting mode setting button (not shown) provided in the interchangeable lens unit 2 or the camera body 3.

  In the auto shooting mode, the lens microcomputer 40 transmits a control signal to the focus lens group drive control unit 41 in response to the half-pressing operation of the release button 30 or the operation of the moving image shooting operation button 35, and the focus lens group L2. Slightly move. The body microcomputer 10 transmits a command to the digital signal processing unit 15. The digital signal processing unit 15 transmits an image signal to the body microcomputer 10 at a predetermined timing based on the received command. Based on the received image signal and the focal length information previously received from the zoom operation lever detector 65 or the zoom ring rotation angle detector 70, the body microcomputer 10 makes the imaging optical system L in focus. The amount of movement of the group L2 in the direction along the optical axis AZ is calculated. The body microcomputer 10 generates a control signal based on the calculation result. The body microcomputer 10 transmits a control signal to the focus lens group drive control unit 41.

  The focus lens group drive control unit 41 automatically moves the focus lens group L2 in the Z-axis direction based on a control signal from the body microcomputer 10.

  As described above, focusing in the autofocus shooting mode of the camera body 3 or the interchangeable lens unit 2 is performed. The above operation is executed instantaneously after the user half-presses the release button 30 or the moving image shooting operation button 35. When the user fully presses the release button 30 or operates the moving image shooting operation button 35, the body microcomputer 10 executes a shooting process and transmits a control signal to the image recording control unit 19 when shooting is completed. The image recording unit 18 records the image signal in the internal memory and / or the removable memory based on a command from the image recording control unit 19. Based on a command from the image recording control unit 19, the image recording unit 18 records information indicating that the shooting mode is the autofocus shooting mode together with the image signal in the internal memory and / or the removable memory.

  On the other hand, in the manual focus shooting mode, the lens microcomputer 40 requests the rotation angle information of the focus ring unit 66 from the focus lens group drive control unit 41. The lens microcomputer 40 generates a control signal for moving the second lens group L <b> 2 based on the detection value detected from the rotation angle of the focus ring 67. The lens microcomputer 40 transmits the generated control signal to the focus lens group drive control unit 41.

  The focus lens group drive control unit 41 moves the focus lens group L2 in the Z-axis direction based on a control signal from the lens microcomputer 40 in accordance with the rotation amount and rotation direction of the focus ring 67.

  As described above, focusing in the manual focus mode of the camera system 1 is performed. When the user fully presses the release button 30 or operates the moving image shooting operation button 35 in the manual focus mode, shooting is performed in that state.

  The body microcomputer 10 transmits a control signal to the image recording control unit 19 when photographing is completed. The image recording unit 18 records the image signal in the internal memory and / or the removable memory based on a command from the image recording control unit 19. Based on a command from the image recording control unit 19, the image recording unit 18 records information indicating that the shooting mode is the manual focus mode together with the image signal in the internal memory and / or the removable memory.

<3: Camera system features>
As described above, in this camera system 1, when an interchangeable lens having an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever, the main body side zoom operation unit and the lens are arranged. Since either one of the side zoom operation units functions as a zoom operation member for optical zoom, the convenience of zoom operation can be improved without competing between the interchangeable lens and the zoom operation lever of the camera body to break down the system. it can. That is, the convenience of the camera system 1 can be improved.

  In addition, when an interchangeable lens that is not equipped with an electronic zoom function is connected to a camera body that has a zoom operation lever, the zoom operation function of the operation unit on the main body side is canceled, or only the operation function for electronic zoom is assigned. The convenience of the zoom operation can be improved without breaking the system, regardless of which of the interchangeable lens equipped with the electric zoom function and the interchangeable lens not equipped with the electric zoom function is attached to the camera body.

  Furthermore, the electronic zoom function is disabled when shooting with the eyepiece in the viewfinder, and the electronic zoom function is used when shooting while looking at the monitor image on the back of the camera body without eyepiece on the viewfinder. By enabling and displaying the fact on the monitor screen, a zoom function suitable for the shooting mode is assigned, so that the convenience of the zoom operation can be improved.

  Furthermore, when an interchangeable lens equipped with an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever, either the main body side zoom operation unit or the lens side zoom operation unit is By prioritizing the previously operated operation unit to function as a zoom operation member for optical zoom, it is possible to improve the convenience of zoom operation without competing zoom operation levers and causing the system to fail.

  Furthermore, when an operation other than optical zoom is assigned to the operation of the main unit side operation unit, or when the operation of the main unit side operation unit is disabled, the operation state of the main unit side operation unit displayed on the LCD monitor or the like is displayed. By changing the displayed display contents, the user can visually recognize the current state of the operation unit on the main body side, so that the convenience of operation of the camera system can be improved.

  In this embodiment, an example in which the zoom operation lever for electric zoom is mounted on the interchangeable lens unit has been described. However, the zoom operation lever for electric zoom is mounted and the manual zoom function is provided. Similarly to the ring 67, a manual zoom can be configured by providing a zoom ring.

  Further, in the present embodiment, when an interchangeable lens equipped with an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever, the main body side zoom operation unit and the lens side zoom operation unit Although an example in which the process of selecting either one is automatically performed has been described, any one of the main body side zoom operation unit and the lens side zoom operation unit may be manually selected regardless of this. . Specifically, a changeover switch may be provided on either the interchangeable lens unit side or the camera body side, or both so that the selection can be made manually.

[Second Embodiment]
In the first embodiment, a quick return mirror 23 is employed. However, the quick return mirror 23 can be omitted when focusing is possible by the contrast detection method. A camera system 1A according to the second embodiment will be described with reference to FIG. FIG. 15 is a block diagram showing the configuration of the camera system 1A. Components having substantially the same functions as those shown in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted.

<1: Overall configuration of camera system>
In FIG. 15, a camera system 1A is an interchangeable lens type digital single-lens reflex camera system, and mainly includes a camera body 3A having the main functions of the camera system 1A, and an exchange mounted removably on the camera body 3A. And a lens unit 2. The interchangeable lens unit 2 is attached to a body mount 4 provided on the front surface of the camera body 3A via a lens mount 79 provided at the rearmost part.

  Compared with the camera body 3 shown in FIG. 1, the camera body 3 </ b> A shown in FIG. 15 omits the quick return mirror 23 that guides the incident light from the imaging unit 71 to the finder optical system 22 and the focus detection unit 5. Instead, an electronic finder unit 95 such as a liquid crystal finder is provided. Similar to the display unit 20, the electronic viewfinder unit 95 can display the image signal recorded in the image recording unit 18 or the buffer memory 16 as a visible image based on a command from the image display control unit 21. . Thereby, even if the quick return mirror 23 is not mounted, the optical image of the subject formed by the imaging optical system L can be observed through the finder eyepiece window 9.

  In this case, the camera body 3A can be thinned in the optical axis AZ direction of the camera body 3A by omitting the finder optical system 22 and the quick return mirror 23. Furthermore, since the distance (lens back) from the lens at the rearmost part of the interchangeable lens unit 2 to the image sensor 11 can be shortened, the interchangeable lens unit 2 can be downsized.

  When the interchangeable lens unit 2 is compatible with moving image shooting, the camera body 3A in FIG. 15 always uses a contrast method based on image data generated by the image sensor 11 as the focus detection method. it can. Thereby, an accurate focus operation can be realized. Furthermore, since the opening / closing operation of the quick return mirror 23 is unnecessary, the focus operation can be speeded up and silenced, and it is possible to easily handle not only still image shooting but also movie shooting. It becomes.

  The interchangeable lens unit 2 is compatible with electric zoom. The zoom lens drive control unit 61 is configured to control the movement of the zoom lens group L1. The zoom lens group L1 may be driven by a stepping motor, a DC motor, an electromagnetic linear motor, an ultrasonic motor, or the like. The zoom lens drive control unit 61 supplies power to these actuators and actuators for speed or position control. It consists of the circuit which performs. The interchangeable lens unit 2 has a zoom operation lever 64 and a zoom operation lever detector. As described above, the zoom operation lever 64 is a lever for adjusting the photographing magnification to the telephoto side or the wide-angle side by operating the lever. When the zoom operation lever 64 is operated, it is detected that the zoom operation lever detection unit is operated to the telephoto side or the wide angle side, and the operation information is transmitted to the lens microcomputer 40. When the lens microcomputer 40 detects that the operation information is operated to the telephoto side, the lens microcomputer 40 moves and controls the zoom lens group L1 to the telephoto side via the zoom lens drive control unit 61. On the other hand, when the lens microcomputer 40 detects that the operation information is operated on the wide angle side, the zoom lens group L1 is moved and controlled to the wide angle side via the zoom lens drive control unit 61.

<2: Features of the camera system>
As described above, similarly to the camera system 1, the camera system 1A can select the finder shooting mode and the monitor shooting mode according to the operation flow of FIG.

  When an interchangeable lens equipped with an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever, either the main body side zoom operation unit or the lens side zoom operation unit is connected to the optical zoom. It can function as a zoom operation member. Therefore, the convenience of the zoom operation can be improved without the interchangeable lens unit 2 and the zoom operation lever of the camera body 3 competing to break the system. That is, the convenience of the camera system 1 can be improved.

  Furthermore, as with the camera system 1, when an interchangeable lens not equipped with an electric zoom function is connected to a camera body having a zoom operation lever, the zoom operation function of the main body side operation unit is canceled or electronic zoom is performed. By assigning only the operation function, it is convenient to operate the zoom without breaking the system, regardless of whether an interchangeable lens with an electric zoom function or an interchangeable lens without an electric zoom function is attached to the camera body. Can be improved.

  Furthermore, as with the camera system 1, when taking an image with the eyepiece in the viewfinder, the electronic zoom function is disabled, and when taking an image while viewing the monitor image on the back of the camera body without making an eyepiece on the viewfinder. By enabling the electronic zoom function and displaying it on the monitor screen, a zoom function suitable for the shooting mode is assigned, so that the convenience of the zoom operation can be improved.

  Furthermore, similarly to the camera system 1, when an interchangeable lens having an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever, the main body side zoom operation unit and the lens side zoom operation are performed. By making one of these units function as a zoom operation member for optical zoom, giving priority to the previously operated operation unit, the zoom operation lever can compete and the convenience of zoom operation can be reduced without breaking the system. Can be improved.

  Furthermore, when an operation other than optical zoom is assigned to the operation of the main unit side operation unit, or when the operation of the main unit side operation unit is disabled, the operation state of the main unit side operation unit displayed on the LCD monitor or the like is displayed. By changing the displayed display contents, the user can visually recognize the current state of the operation unit on the main body side, so that the convenience of operation of the camera system can be improved.

  In this embodiment, an example in which the zoom operation lever for electric zoom is mounted on the interchangeable lens unit has been described. However, the zoom operation lever for electric zoom is mounted and the manual zoom function is provided. Similarly to the ring 67, a manual zoom can be configured by providing a zoom ring.

  Further, in the present embodiment, when an interchangeable lens equipped with an electric zoom function and having a zoom operation lever is connected to a camera body having a zoom operation lever, the main body side zoom operation unit and the lens side zoom operation unit Although an example in which the process of selecting either one is automatically performed has been described, any one of the main body side zoom operation unit and the lens side zoom operation unit may be manually selected regardless of this. . Specifically, a changeover switch may be provided on either the interchangeable lens unit side or the camera body side, or both so that the selection can be made manually.

[Other Embodiments]
(1)
In the present embodiment, various setting menus for moving image shooting may be set using the display unit based on the information on whether or not the moving image shooting of the interchangeable lens unit 2 is possible.

(2)
An image blur correction unit may be provided in one or both of the interchangeable lens unit 2 and the camera body 3. In this case, the camera system may be such that any one of the image blur correction units can be selected.

(3)
In this embodiment, the exposure time to the image sensor is controlled by operating the shutter. However, the present invention is not limited to this, and the exposure time of the image sensor may be controlled by an electronic shutter or the like.

(4)
In the present embodiment, the lens information includes information indicating whether or not movie shooting is supported. However, whether or not it supports moving image shooting may be determined based on whether or not the focus lens group drive method or the focus lens group drive control unit 41 is compatible with a contrast detection method. Regarding the driving method of the focus lens group, it may be determined whether or not the focus lens group is directly driven by using a stepping motor or a linear actuator (electromagnetic method or piezoelectric method).

(5)
In the present embodiment, the interchangeable lens unit 2 is compatible with moving image shooting. However, as described above, the interchangeable lens unit may not support moving image shooting.

  The camera system according to the present invention is suitable for a digital still camera, a digital video camera, a mobile phone equipped with a camera unit, a PDA, or the like that requires a moving image shooting function.

Block diagram showing the configuration of the camera system (when the interchangeable lens unit is equipped with a zoom control lever) Block diagram showing the configuration of the camera body Diagram showing schematic configuration of camera body Diagram explaining viewfinder shooting mode Diagram explaining monitor shooting mode Processing flowchart of the camera body regarding the determination of the presence or absence of the electric zoom function and the zoom operation lever Explanation of display contents on the camera body display with or without electric zoom function Processing flowchart of the camera body related to whether the electronic zoom function is enabled or disabled Explanation of contents displayed on the camera display when the electronic zoom function is enabled or disabled Processing flow chart of the camera body related to the zoom operation part selection of the electric zoom function (prior operation key priority) Processing flow chart of the camera body related to the zoom operation part selection of the electric zoom function (zoom operation lever priority) Schematic perspective view of the camera system (when the interchangeable lens unit is equipped with a zoom control lever) Schematic perspective view of the camera system (when the interchangeable lens unit is equipped with a zoom ring) Block diagram showing the configuration of the camera system (when the interchangeable lens unit is equipped with a zoom ring) Block diagram showing the configuration of a camera system (second embodiment)

Explanation of symbols

1 Camera system 2 Interchangeable lens unit (lens barrel)
3 Camera body 3a Case 4 Body mount 10 Body microcomputer (control unit)
11 Imaging sensor (imaging unit)
DESCRIPTION OF SYMBOLS 12 Image sensor drive control part 20 Display part 21 Image display control part 23 Quick return mirror 25 Power switch 26 Mode switching dial 27 Cross operation key (main body operation part)
28 MENU Setting Button 29 SET Button 30 Release Button 31 Shutter Control Unit 33 Shutter Unit 34 Viewfinder Switch Button 35 Movie Shooting Operation Button 40 Lens Microcomputer 41 Focus Lens Group Drive Control Unit 61 Zoom Lens Drive Control Unit 64 Zoom Operation Lever (Lens Side Zoom) Operation part)
65 Zoom operation lever detector 69 Zoom ring 70 Zoom ring rotation angle detector 79 Lens mount 95 Electronic viewfinder L Imaging optical system L1 First lens group L2 Second lens group

Claims (12)

A mount in which a lens barrel is detachable, an imaging unit for acquiring an image of a subject,
When a lens barrel capable of electric optical zoom is attached, a camera body including a main body side operation unit for operating the optical zoom,
Lens information including information on whether or not the mounted lens barrel has an electric zoom operation and information on whether or not it has a lens-side zoom operation unit for operating an optical zoom operation is displayed on the lens mirror. A camera main body comprising a control unit that controls a function acquired from a cylinder and assigned to the main body side operation unit according to the lens information. The control unit operates an operation different from the optical zoom operation when a lens barrel having a lens-side zoom operation unit capable of performing an optical zoom operation and operating an optical zoom operation is attached. The camera body according to claim 1, wherein a function is assigned to the body side operation unit. The control unit assigns, to the main body side operation unit, a function of operating an operation different from the optical zoom operation when a lens barrel that is not electrically optically zoomable is attached. 1. The camera body according to 1. 2. The camera body according to claim 1, wherein the control unit invalidates the operation of the body side operation unit when a lens barrel that is not capable of electric optical zooming is attached. 3. It further comprises an electronic zoom function for enlarging and displaying or recording a partial range of the acquired image, and the control unit assigns a function for operating an enlargement ratio changing operation of the electronic zoom to the main body side operation unit. The camera body according to claim 2 or claim 3, wherein A viewfinder shooting mode in which the subject image guided to the viewfinder is checked with a movable mirror inserted in the optical path, and an image display shooting mode in which the subject image displayed on the image display unit is checked and shot. The camera main body according to claim 5, wherein the control unit invalidates the operation of the main body side operation unit when shooting in the finder shooting mode. The control unit is capable of electrically powered optical zoom, and when a lens barrel having a lens side zoom operation unit for operating an optical zoom operation is attached, during operation of the main body side operation unit The camera body according to claim 1, wherein the operation of the lens side zoom operation unit is invalidated. The control unit is capable of electrically optical zooming, and when the lens barrel having the lens side zoom operation unit for operating the optical zoom operation is attached, the lens side zoom operation unit is being operated. 2. The camera body according to claim 1, wherein the operation of the body side operation unit is invalidated. The display unit displays information related to the operation of the main body side operation unit, and the control unit changes contents displayed on the display unit according to a function assigned to the operation of the main body side operation unit. The camera body according to any one of claims 1 to 8. The camera body according to claim 9, wherein the control unit invalidates a display corresponding to a function in which the operation of the main body side operation unit is invalidated. It is attached to the camera body according to any one of claims 1 to 10, and has information on whether or not electric optical zoom is possible and whether or not it has a lens side zoom operation unit for operating an optical zoom operation. A lens barrel comprising a storage unit for storing lens information including the above information. A camera system comprising: the camera body according to claim 1; and the lens barrel according to claim 11.

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