JP2012194399A - Camera system and control program of camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow diversified photographing to be performed with good operability while preventing a system failure caused by conflict between electric zooming operations and the like when an interchangeable lens having an electric zooming operation function is attached to a camera body.SOLUTION: In a camera body 101 to which an interchangeable lens 201 comprising an electrically-driven zoom lens 204 and a zoom lens operation button 206 consisting of a lens telephoto button 207T and a lens wide-angle button 207W can be attached and which is provided with a body zooming operation button 109 from a body telephoto button 110T and a body wide-angle button 110W, a control function is provided which allocates electric zooming operation of the zoom lens 204 to one of the body zooming operation button 109 and the zoom lens operation button 206 and allocates a function other than the zooming operation to the other. A camera having this control function is provided.

Description

  The present invention relates to a camera system and a camera system control program.

Conventionally, there have been digital still cameras that have the same movie shooting function as video cameras, but most of them are a camera lens and camera body that are integrated into a single type, and the shooting system can be used to replace movie lenses. There wasn't much that was possible.
However, in recent years, the number of products equipped with a moving image shooting function is rapidly increasing even in the interchangeable lens digital still camera.
In movie shooting, recording is usually performed at the same time as recording an image, so there is a problem that if the iris, focus, zoom, etc. are driven during shooting, the drive sound is recorded. Interchangeable lenses that have been made quieter are becoming popular.

However, as with the conventional interchangeable lens, most of the zoom driving types manually rotate the zoom ring, and the sliding sound during the zoom ring operation may be recorded. It is considered that so-called electric zoom type interchangeable lenses that perform a zoom operation electrically by a button operation or the like that can reduce the noise of the camera will become widespread.
When an electric zoom type interchangeable lens becomes widespread, there is a possibility that an interchangeable lens having an operation unit such as a zoom button for performing an electric zoom operation and a camera body may be mixed. Such an interchangeable lens and a camera body There is a technical problem in that there is a concern that system failure may occur due to competition between the electric zoom operation units when connected.

  As a method for solving such a technical problem, for example, in Patent Document 1, when an electric zoom type interchangeable lens having an electric zoom operation unit is attached to a camera main body having an electric zoom operation unit, the camera main body Depending on whether the shooting mode is a viewfinder shooting mode in which you take a picture through the viewfinder or a monitor shooting mode in which you take a picture while looking at the display monitor on the rear LCD of the camera body, either the interchangeable lens or the camera body is powered A technique of enabling only the zoom operation unit is disclosed.

JP 2009-122340 A

However, in the case of the technique disclosed in Patent Document 1, since only one electric zoom operation unit of the interchangeable lens or the camera body is effective, the other electric zoom operation unit is in an invalid state and is involved in the camera operation. There was a technical problem of becoming a meaningless operation unit.
An object of the present invention is to provide a technique that prevents a system failure due to competition of an electric zoom operation when an interchangeable lens having an electric zoom operation function is attached to the camera body, and enables various shootings with high operability. There is to do.

According to a first aspect of the present invention, an interchangeable lens having a lens-side zoom operation means for performing an electric zoom operation and capable of performing an electric optical zoom operation of the photographing lens is replaceably mounted, and the electric motor of the interchangeable lens is mounted. A camera body having a camera body side zoom operation means for performing a zoom operation;
When the interchangeable lens is mounted on the camera body, an electric zoom operation function is assigned to one of the camera body side zoom operation means and the lens side zoom operation means, and an auxiliary function of the electric zoom operation is assigned to the other. Control means;
A camera system comprising:

According to a second aspect of the present invention, there is provided a control program for a camera system in which camera body side zoom operation means for performing electric zoom operation of an interchangeable lens is provided in a camera body.
A first step of detecting the mounting of the interchangeable lens having a lens side zoom operation means for performing an electric zoom operation with electric zoom operation of the photographic lens;
When the attachment of the interchangeable lens is detected, a second function assigns an electric zoom operation function to one of the camera body side zoom operation means and the lens side zoom operation means, and assigns an auxiliary function of the electric zoom operation to the other. Steps,
A control program for a camera system is provided.

  According to the present invention, there is provided a technique capable of preventing a system failure due to competition of an electric zoom operation when an interchangeable lens having an electric zoom operation function is attached to the camera body, and enabling various shootings with high operability. can do.

1 is a schematic view of a digital still camera equipped with an interchangeable lens according to the present invention. It is the figure which showed typically an example of the interchangeable lens external appearance which concerns on one embodiment of this invention. It is a block diagram which shows an example of the electrical structure of the camera which is one embodiment of this invention. It is a control process transition diagram for demonstrating an example of the zoom drive operation | movement of the camera which concerns on Embodiment 1 of this invention. It is a flowchart for demonstrating an example of the still imaging operation | movement of the camera which concerns on Embodiment 1 of this invention. 6 is a flowchart for explaining an example of a zoom drive operation of the camera according to Embodiment 1 of the present invention. It is a flowchart for demonstrating an example of the still imaging operation | movement of the camera which concerns on Embodiment 2 of this invention. It is a rear view for demonstrating an example of the zoom drive speed setting menu screen of the camera which concerns on Embodiment 2 of this invention. It is a rear view for demonstrating an example of the preset zoom position setting menu screen of the camera which concerns on Embodiment 2 of this invention. It is a rear view for demonstrating an example of the preset zoom position setting menu screen of the camera which concerns on Embodiment 2 of this invention. It is a flowchart for demonstrating an example of the still imaging operation | movement of the camera which concerns on Embodiment 3 of this invention. It is a flowchart for demonstrating an example of the still imaging operation | movement of the camera which concerns on Embodiment 4 of this invention.

According to a first aspect of the present embodiment, in a camera system in which a taking lens can be exchanged, an interchangeable lens having lens zoom operation means for performing an electric zoom operation capable of electric optical zoom operation is provided. When mounted on a camera body having a camera body zoom operation means for operation, an original electric zoom operation function is assigned to either the camera body zoom operation means or the lens zoom operation means, and the electric zoom operation to the other A camera system is provided that is assigned with an auxiliary function, a zoom function other than a normal electric zoom operation, or a function other than a zoom operation.
The second aspect of the present embodiment is characterized in that an original electric zoom operation function is assigned to either the camera body zoom operation means or the lens zoom operation means, and a zoom drive speed change function is assigned to the other. A camera system according to the first aspect is provided.
In the third aspect of the present embodiment, the original electric zoom operation function is assigned to either the camera body zoom operation means or the lens zoom operation means, and the automatic drive function to a predetermined zoom position is assigned to the other. A camera system according to the first aspect is provided.
According to a fourth aspect of the present embodiment, there is provided the camera system according to the third aspect, wherein the predetermined zoom position is a telephoto end or a wide-angle end of the interchangeable lens.
According to a fifth aspect of the present embodiment, the predetermined zoom position is a zoom position that is fixedly set in advance or a zoom position that is arbitrarily set by a photographer. Provide a camera system.
In a sixth aspect of the present embodiment, the predetermined zoom position is a zoom position corresponding to a shooting magnification that is fixedly set in advance or a zoom position corresponding to a shooting magnification that is arbitrarily set by a photographer. A camera system according to a third aspect is provided.
The seventh aspect of the present embodiment is characterized in that the original electric zoom operation function is assigned to either the camera body zoom operation means or the lens zoom operation means, and the between-exposure zoom function is assigned to the other. A camera system according to a first aspect is provided.
In the eighth aspect of the present embodiment, the original electric zoom operation function is assigned to either the camera body zoom operation means or the lens zoom operation means, and the focus lens drive function or the aperture drive function is assigned to the other. The camera system according to the first aspect is provided.

  According to the technology of each aspect described above, it is possible to prevent a system failure when an electric zoom type interchangeable lens having an electric zoom operation unit is attached to a camera body having an electric zoom operation unit. It is possible to provide an interchangeable lens and a camera system that can perform various shootings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the following description of each embodiment, the term “electric” is not limited to electrical energy, but a displacement is applied to a movable part such as a lens by an actuator that operates with mechanical energy such as ultrasonic vibration. It is a concept that encompasses technology.

(Embodiment 1)
FIG. 1 is a schematic view of a digital still camera equipped with an interchangeable lens according to the present invention. That is, the camera system 100 according to the present embodiment includes a camera body 101 as an example, and an interchangeable lens 201 that is detachable from the camera body 101 is attached.

The camera body 101 includes a camera control circuit 102, an image sensor 103, a focal plane shutter 104, a display monitor 105, a strobe 106, a release button 107, a battery 108, a body zoom operation button 109 (camera body side zoom operation means), and the like. It is comprised including.
The main body zoom operation button 109 includes a main body telephoto button 110T and a main body wide-angle button 110W.
The camera control circuit 102 performs various drive controls of the interchangeable lens 201 through the lens control circuit 202 in accordance with the operation of the release button 107 by the photographer, and controls the image sensor 103 and the focal plane shutter 104, which is necessary. For example, the light emission control of the strobe 106 is also performed to execute the photographing operation.

The camera control circuit 102 performs display control of the display monitor 105 according to various operations of the camera system 100.
The image sensor 103 is configured by a CCD, a CMOS sensor, or the like, and captures a subject image formed on the imaging surface by the interchangeable lens 201.
The focal plane shutter 104 performs an opening / closing operation according to the operation of the release button 107 by the photographer, and performs an exposure operation on the imaging surface of the image sensor 103.
The strobe 106 performs a light emission operation in synchronism with the exposure operation in the focal plane shutter 104 by the electric charge stored in a light emission capacitor (not shown).
The display monitor 105 is composed of a liquid crystal display, an organic EL, and the like, and displays a through image during standby for shooting or when shooting a movie, and a playback image, setting information, etc. according to the operation of a playback button and various setting buttons (not shown) by the photographer. Is displayed.

  Further, the zoom operation button 109 (main body telephoto button 110T, main body wide-angle button 110W) is operated by the photographer to electrically adjust the focal length of the interchangeable lens 201 via the camera control circuit 102 and the lens control circuit 202. It has a function to change.

On the other hand, the interchangeable lens 201 includes a lens control circuit 202, a focus adjustment lens 203, a zoom lens 204, a diaphragm 205, and the like.
A lens control circuit 202 performs drive control of the focus adjustment lens 203, the zoom lens 204, and the diaphragm 205.
The focus adjustment lens 203 moves in the optical axis direction to adjust the focal state of the interchangeable lens 201, and the zoom lens 204 moves in the optical axis direction to change the focal length of the interchangeable lens 201.
The diaphragm 205 adjusts the amount of light incident in the direction toward the camera body 101 by changing the aperture area.

Further, the interchangeable lens 201 includes a lens zoom operation button 206 (lens side zoom operation means) for the photographer to perform an operation of electrically changing the focal length. The lens zoom operation button 206 includes a lens telephoto button 207T and a lens wide-angle button 207W.
The interchangeable lens 201 has an operation mode change lever 208 for switching operations executed by operating the lens zoom operation button 206 (lens telephoto button 207T, lens wide-angle button 207W).

FIG. 2 is a diagram schematically showing an example of the appearance of an interchangeable lens according to an embodiment of the present invention.
As described above, the interchangeable lens 201 has the lens zoom operation button 206 (the lens telephoto button 207T and the lens wide-angle button 207W) on the side surface, and the photographer performs the electric zoom operation of the interchangeable lens 201 by performing the button operation. be able to.

  In the example of FIG. 2, the operation of the lens zoom operation button 206 (lens telephoto button 207T, lens wide-angle button 207W) is changed from electric zoom (ZM) to electric manual focus (by switching the position of the operation mode change lever 208. PF) and electric diaphragm operation (AV).

  For example, when the position of the operation mode change lever 208 is the basic position ZM, when the lens telephoto button 207T is pressed, the zoom lens 204 of the interchangeable lens 201 moves to the telephoto side, and when the lens wide angle button 207W is pressed, the wide angle side is reached. Moving.

  When the operation mode change lever 208 is rotated clockwise and the position is set to PF, the manual focus (power focus) mode is set. When the lens telephoto button 207T is pressed, the focus adjustment lens 203 of the interchangeable lens 201 is moved to the infinity side. When the lens is moved and the lens wide-angle button 207W is pressed, it moves to the closest side.

  Further, when the operation mode change lever 208 is rotated counterclockwise and the position is set to AV, the motorized aperture operation mode is set. When the lens telephoto button 207T is pressed, the aperture 205 of the interchangeable lens 201 is reduced, and the lens wide-angle button 207W. Press to open to the open side.

The operation system of the interchangeable lens 201 is not limited to the above example, and the lens zoom operation button 206 (lens telephoto button 207T, lens wide-angle button 207W) is an integral lever type, a ring shape type along the outer periphery of the lens, A touch panel or the like may be used.
The operation mode change lever 208 may also be another type of switch such as a slide type or an independent button type.

Also, the operation mode is not limited to the above three modes of ZM, PF, and AV, and other modes such as a camera shake correction mode may be included.
The electrical configuration of the camera system 100 of the present embodiment as described above will be described with reference to FIG. FIG. 3 is a block diagram illustrating an example of an electrical configuration of the camera according to the present embodiment.

  First, a configuration related to the camera body 101 will be described. The interior of the camera body 101 is configured to include a body CPU 121 that controls the entire camera system 100.

The main body CPU 121 stores a communication line 232 for communicating with the lens CPU 221 via the communication circuit 231, a control program 135 (control means) for the main body CPU 121, and the like, and a nonvolatile memory 122 (such as a flash ROM). FROM) and a memory 123 such as a RAM for temporarily storing various information of the main body CPU 121 are connected.
In the case of the present embodiment, the main body CPU 121 executes a control program 135, thereby realizing a control operation exemplified in a state transition diagram and flowcharts described later.

  Further, the main body CPU 121 shoots an image sensor control circuit 124 that controls the image sensor 103 to obtain image data, and performs image processing such as A / D conversion and filter processing on the image signal output from the image sensor 103. An image processing circuit 125 that performs processing such as generation of image data to be stored as an image and extraction of high-frequency components from image data in the focus detection region by high-pass filter processing to calculate an AF (autofocus) evaluation value is connected. Yes.

  Further, the main body CPU 121 includes a shutter control circuit 126 for controlling the focal plane shutter 104, a display circuit 127 for displaying captured images and various types of shooting information on the display monitor 105, a strobe control circuit 128 for controlling the strobe 106, A main body operation switch detection circuit 129 for detecting various operation switch states and a power supply circuit 134 for smoothing and boosting the voltage of the loaded battery 108 and supplying power to the camera system 100 are connected.

  The main body operation switch detection circuit 129 includes various operation switches of the camera main body 101 operated by the photographer, for example, a switch (not shown) that switches the shooting mode of the camera system 100, a release switch that operates by operating the release button 107, and a main body A main body telephoto switch 132, a main body wide angle switch 133, and the like that are operated by operating the zoom operation buttons 109 (the main body telephoto button 110T and the main body wide angle button 110W) are connected.

  The release switch in this embodiment is a general two-stage switch, and the main body CPU 121 executes operation control according to the state of each switch detected by the main body operation switch detection circuit 129.

  That is, when the first release switch 130 (hereinafter referred to as a 1R switch) is turned on by half-pressing the release button, focus detection and photometry are performed, and the focus adjustment lens 203 of the interchangeable lens 201 is driven to bring it into focus. Become. Further, when the second release switch 131 (hereinafter referred to as a 2R switch) is turned on by fully pressing the release button, the focal plane shutter 104 is driven to perform exposure.

The two zoom switches in the present embodiment are independent push switches, and the main body CPU 121 executes operation control according to the state of each switch detected by the main body operation switch detection circuit 129.
That is, when the main body telephoto button 110T is pressed and the main body telephoto switch 132 is turned on, the zoom lens 204 of the interchangeable lens 201 is driven to the telephoto side, the main body wide angle button 110W is pressed and the main body wide angle switch 133 is turned on. When the state is reached, the zoom lens 204 is driven to the wide angle side.

Next, a configuration related to the interchangeable lens 201 will be described. The interior of the interchangeable lens 201 includes a focus adjustment lens 203, a zoom lens 204, a diaphragm 205, and a lens CPU 221 that controls various controls of the interchangeable lens 201.
The lens CPU 221 includes a lens position detection circuit 223, a lens drive circuit 222, a zoom position detection circuit 225, a zoom drive circuit 224, an aperture drive circuit 226, a lens operation switch detection circuit 227 that detects various operation switch states, and The communication circuit 231 is connected.

  The lens CPU 221 performs various driving controls such as lens driving and diaphragm driving, and communicates with the main body CPU 121 of the camera main body 101 via the communication circuit 231 to receive an operation command, the lens operating state of the interchangeable lens 201, optical data, and the like. Send. For this reason, the communication connection terminal of the communication circuit 231 is provided outside the interchangeable lens 201.

  When the lens CPU 221 receives a focus adjustment lens driving command from the main body CPU 121 or when the operation mode change switch 230 is set to the electric manual focus mode, the lens zoom operation button 206 (lens telephoto button 207T, lens wide angle) When either the lens telephoto switch 228 or the lens wide-angle switch 229 is turned on by operating the button 207W), the lens driving circuit 222 including an actuator such as a stepping motor, a motor driver, and the like is driven, and the interchangeable lens 201 is driven. Change the focus position.

The position of the focus adjustment lens 203 driven by the lens driving circuit 222 is detected by the lens position detection circuit 223. The lens position detection circuit 223 includes, for example, a photo interrupter (PI) circuit that detects the rotation amount of the driving motor included in the lens driving circuit 222 by converting it into a pulse number. In this photo interrupter circuit, the absolute position from the focus adjustment lens 203 is represented by the number of pulses from a predetermined reference position such as an infinite end.
The lens CPU 221 performs drive control of the focus adjustment lens 203 by the lens drive circuit 222 based on the lens position information detected by the lens position detection circuit 223.

  In the zoom lens 204, when the lens CPU 221 receives a zoom lens drive command from the main body CPU 121 or when the operation mode change switch 230 is set to the electric zoom mode, the lens zoom operation button 206 (lens telephoto button 207T, lens wide angle button 207W). When either the lens telephoto switch 228 or the lens wide-angle switch 229 is turned on by the above operation, it is driven by the zoom drive circuit 224 including an actuator such as a stepping motor, a motor driver, etc. To change.

  The position of the driven zoom lens 204 is detected by a zoom position detection circuit 225. The zoom position detection circuit 225 includes, for example, a linear encoder, an A / D conversion circuit, and the like, and performs position detection based on the A / D conversion result of the encoder value. The lens CPU 221 performs drive control of the zoom lens 204 by the zoom drive circuit 224 based on the position information of the zoom lens 204 detected by the zoom position detection circuit 225.

  The diaphragm 205 includes an opening for adjusting the amount of light incident in the direction toward the camera body 101. When the lens CPU 221 receives an aperture drive command from the main body CPU 121 via the communication circuit 231 or when the operation mode change switch 230 is set to the electric aperture mode, the lens zoom operation button 206 (lens telephoto button 207T, lens wide angle button 207W) ), When either the lens telephoto switch 228 or the lens wide-angle switch 229 is turned on, it is driven by an aperture driving circuit 226 including an actuator such as a stepping motor, a motor driver, etc. Change the size of.

  The lens operation switch detection circuit 227 includes various operation switches of the interchangeable lens 201 operated by the photographer, for example, a lens telephoto switch 228 operated by operating a lens zoom operation button 206 (lens telephoto button 207T, lens wide angle button 207W), A lens wide-angle switch 229, an operation mode change switch 230 that operates by operating the operation mode change lever 208, and the like are connected.

The lens telephoto switch 228 and the lens wide-angle switch 229 in the present embodiment are independent push switches, and the lens CPU 221 executes operation control according to the state of each switch detected by the lens operation switch detection circuit 227. .
For example, when the operation mode change switch 230 is set to the electric zoom mode and the lens telephoto button 207T is pressed and the lens telephoto switch 228 is turned on, the zoom lens 204 is driven to the telephoto side, and the lens wide-angle button 207W is When the lens wide-angle switch 229 is pressed and turned on, the zoom lens 204 is driven to the wide-angle side.

  In addition, the operation mode change switch 230 in the present embodiment is a three-state rotation switch. In other words, by rotating the operation mode change lever 208 to change the position, the operation executed by the operation of the lens zoom operation button 206 (lens telephoto button 207T, lens wide angle button 207W) can be changed to the electric zoom (ZM) as described above. ), Electric manual focus (PF), and electric aperture operation (AV).

  The lens CPU 221 detects the state of the switch by the lens operation switch detection circuit 227, and executes operation control according to the setting mode.

Next, referring to the control process transition diagram of FIG. 4 and the flowcharts of FIGS. 5 and 6, an example of a still photographing operation in the camera when the above-described interchangeable lens according to the first embodiment and the camera body are connected is described. This will be described below.
FIG. 4 is a control process transition diagram for explaining an example of the zoom drive operation of the camera according to the present invention.
The control operation in the camera body 101 transitions between the following four states.
(Body side state B1):
When the power switch of the camera body 101 is turned on, the control system in the camera body 101 is initialized.

(Body side state B2):
The camera body 101 acquires the lens identification data and confirms the type of the mounted interchangeable lens 201. If the camera body 101 is a lens that is equipped with an electric zoom operation member that is compatible with the electric zoom according to the present invention, the lens zoom operation is performed. After prohibiting the normal electric zoom operation by operating the button 206 (lens telephoto button 207T, lens wide-angle button 207W), the mode shifts to the synchronous communication mode.

(Body side state B3):
Lens state data is acquired by synchronous communication, and focus control of the interchangeable lens 201 is determined based on the acquired data (in FIG. 4, the lens state data is acquired only at the timing of the body side state B3 for simplicity. Actually, however, for example, lens state data is acquired at a synchronization signal cycle, and a control operation to be executed is determined each time).

(Body side state B4):
When the body zoom operation button 109 (the body telephoto button 110T, the body wide-angle button 110W) of the camera body 101 is operated and the body telephoto switch 132 or the body wide-angle switch 133 is turned on, the interchangeable lens 201 starts zoom driving. If the main body telephoto switch 132 or the main body wide-angle switch 133 changes from the on state to the off state, the zoom driving stop is requested.

On the other hand, the control operation in the interchangeable lens 201 in the present embodiment transitions the following seven states.
(Lens side state L1):
When power is supplied from the mount contact, the interchangeable lens 201 initializes the system inside the interchangeable lens 201.

(Lens side state L2):
The interchangeable lens 201 extracts lens identification data requested from the camera body 101 from the stored lens data, converts the lens identification data into a predetermined format defined by the camera system 100 of the present embodiment, and transmits the data to the communication circuit 231. Store in buffer.

(Lens side state L3):
The interchangeable lens 201 prohibits a normal electric zoom operation by operating the lens zoom operation button 206 (lens telephoto button 207T, lens wide-angle button 207W) in response to a request from the camera body 101. In this embodiment, the lens zoom operation button 206 (lens telephoto button 207T, lens wide angle button 207W) during normal electric zooming by operating the main body zoom operation button 109 (main body telephoto button 110T, main body wide angle button 110W) of the camera main body 101. Is set to execute zooming speed change

(Lens side state L4):
The interchangeable lens 201 performs synchronous communication mode compatible setting in response to a synchronous communication start request from the camera body 101.

(Lens side state L5):
In response to a lens state data request from the camera body 101, the interchangeable lens 201 converts the current lens state into a predetermined format and stores it in the transmission buffer of the communication circuit 231.

(Lens side state L6):
The interchangeable lens 201 starts zoom driving in a designated direction in response to a zoom drive start request from the camera body 101, and stops zoom drive in response to a zoom drive stop request.

(Lens side state L7):
When the interchangeable lens 201 is in the zoom drive in response to the zoom drive start request from the camera body 101, the lens telephoto switch 228 is turned on by the operation of the lens zoom operation button 206 (lens telephoto button 207T, lens wide-angle button 207W). When the zoom driving speed is increased and the lens wide-angle switch 229 is turned on, the zoom is decelerated.

  When the lens telephoto switch 228 or the lens wide-angle switch 229 changes from the on state to the off state, the zoom drive speed is returned to the original standard speed.

The relationship of the state of the control operation between the camera body 101 and the interchangeable lens 201 of the present embodiment is as follows as an example.
As an example, the control states of the camera body 101 and the interchangeable lens 201 described above transition in cooperation by exchanging information with each other as follows.

(Body side output B1-1):
Power is supplied from the camera body 101 to the interchangeable lens 201 via the mount contact.
(Body side output B2-1):
The camera body 101 transmits a lens identification data request command based on a predetermined communication protocol such as serial communication defined in the camera system 100 of the present embodiment to the interchangeable lens 201 and requests transmission of lens type data.

(Lens side output L2-1):
The interchangeable lens 201 transmits lens identification data to the camera body 101 in response to the received lens identification data request command.

(Body side output B2-2):
The camera body 101 transmits an operation unit operation restriction command and makes a request to prohibit normal electric zoom operation by operating the lens zoom operation button 206 (lens telephoto button 207T, lens wide angle button 207W) of the interchangeable lens 201.
(Body side output B2-3):
The camera body 101 transmits a synchronous communication start command to the interchangeable lens 201 to start the synchronous communication mode.

(Body side output B3-1):
The camera body 101 periodically transmits a lens state data request command based on the synchronization signal.

(Lens side output L5-1):
The interchangeable lens 201 transmits the lens state data to the camera body 101 in response to the received lens state data request command.

(Body side output B4-1):
The camera body 101 transmits a zoom drive start command to the interchangeable lens 201 and requests the zoom drive start.
(Body side output B4-2):
The camera body 101 transmits a zoom drive stop command to the interchangeable lens 201 and requests zoom drive stop.

The above cooperative operation is summarized as follows. In this case, the lens zoom operation button 206 is assigned to acceleration / deceleration of the zoom speed.
When the power is turned on, internal initialization of the camera body 101 and the interchangeable lens 201 is performed (B1, B1-1, L1).
Next, lens operating conditions are set according to the lens identification data (B2, L2 to L4).
That is, first, the lens identification data is acquired (B2, B2-1, L2, L2-1).

Next, when the interchangeable lens 201 is an electric zoom with a zoom operation unit, the zoom operation of the lens side zoom operation unit alone is prohibited, and an acceleration / deceleration function during zooming is assigned (B2-2, L3).
Further, the mode is set to the synchronous communication mode (B2-3, L4).
Thereafter, the lens state communication is executed at a predetermined cycle according to the synchronization frequency (B3, B3-1, L5, L5-1).
When the main body zoom operation button 109 on the camera main body 101 side is turned on, zoom driving is performed to the telephoto side and the wide angle side depending on which of the main body telephoto button 110T and the main body wide angle button 110W is operated (B4, B4-1, L6).

  When the lens zoom operation button 206 of the interchangeable lens 201 is turned on during zoom driving, the zoom speed is accelerated or decelerated depending on which of the lens telephoto button 207T or lens wide-angle button 207W is operated, and is turned OFF Stops acceleration / deceleration and returns to the original speed (L7).

  When the body zoom operation button 109 on the camera body 101 side is turned off, the zoom drive is stopped (B4-2).

  FIG. 5 is a flowchart for explaining an example of the still photographing operation of the camera according to Embodiment 1 of the present invention.

(Step S101):
When the power of the camera body 101 is turned on, the body CPU 121 determines whether or not the interchangeable lens 201 is attached by detecting a mount switch state (not shown) by the body operation switch detection circuit 129 and is attached. Then, the process proceeds to step S102, and if it is not mounted, a standby operation such as periodically detecting mounting is performed until it is mounted.
When the photographer performs an operation for changing the photographing parameter or an operation for reproducing an image photographed in the past during the standby, the instructed operation is executed.

(Step S102):
When the interchangeable lens 201 is attached, the main body CPU 121 communicates with the lens CPU 221 via the communication circuit 231 and the communication line 232, acquires model information, optical data, and the like of the interchangeable lens 201 and stores them in the memory 123.

  When the interchangeable lens 201 is a lens that is compatible with the electric zoom according to the present embodiment and is equipped with an electric zoom operation member, the interchangeable lens 201 communicates with the lens CPU 221, and the lens zoom operation button 206 (lens telephoto button 207T, lens wide angle button 207W). ) The normal electric zoom operation by the operation of) is prohibited.

  After executing the initial setting and the like as described above, the main body CPU 121 starts synchronous communication with the lens CPU 221 and shifts to the synchronous communication mode. Thereafter, the lens CPU 121 periodically acquires lens state data and performs control operations according to the lens state. Execute.

(Step S103):
The main body CPU 121 operates the image sensor control circuit 124 to acquire image data from the image sensor 103, performs image processing for live view display (so-called live view display) in the image processing circuit 125, and displays the image in the display circuit 127. Display of a through image on the monitor 105 is started.

(Step S104):
The main body CPU 121 detects whether or not the interchangeable lens 201 is mounted by detecting a mount switch state (not shown) by the main body operation switch detection circuit 129. If the interchangeable lens 201 is mounted, the process proceeds to step S105. If is removed, the process returns to step S101.

(Step S105):
Whether or not the power of the camera body 101 is turned on is checked. If it is turned on, the process proceeds to step S106. If it is turned off, the process proceeds to step S114.

(Step S106):
The main body CPU 121 detects the states of the main body telephoto switch 132 and the main body wide angle switch 133 by the main body operation switch detection circuit 129, and the main body zoom operation button 109 (the main body telephoto button 110T, the main body wide angle button 110W) of the camera main body 101 is operated. If it is detected that is turned on, the process proceeds to step S107. If both are turned off, the process proceeds to step S108.

(Step S107):
The main body CPU 121 communicates with the lens CPU 221 via the communication circuit 231 and the communication line 232 to execute zoom driving. Details of the zoom driving operation will be described later with reference to FIG.

(Step S108):
When the main body operation switch detection circuit 129 detects that the 1R switch 130 is turned on, the process proceeds to step S109, and when it is turned off, the process returns to step S104.

(Step S109):
The main body CPU 121 communicates with the lens CPU 221 via the communication circuit 231 and the communication line 232, causes the lens position detection circuit 223 and the lens drive circuit 222 to perform drive control of the focus adjustment lens 203, and captures an image using the image sensor control circuit 124. The element 103 is controlled to pick up an image, and the image processing circuit 125 extracts a high frequency component of the image pickup signal as an AF evaluation value from the image pickup signal output from the image pickup element 103. 203 is driven to the in-focus position.

In parallel with the AF operation, other operations necessary for photographing such as photometry and exposure calculation are also executed.
(Step S110):
Whether or not the 1R switch 130 is in the on state is confirmed by the main body operation switch detection circuit 129. If the 1R switch 130 is in the on state, the process proceeds to step S111. If the 1R switch 130 is in the off state, the process returns to step S104.

(Step S111):
If the main body operation switch detection circuit 129 detects that the 2R switch 131 is turned on, the process proceeds to step S112. If the 2R switch 131 is turned off, the process returns to step S110.

(Step S112):
Based on the exposure calculation result in step S109, the main body CPU 121 communicates with the lens CPU 221 via the communication circuit 231 and the communication line 232, and causes the diaphragm drive circuit 226 to perform drive control of the diaphragm 205, and also the image sensor control circuit. 124, the image pickup device 103 and the focal plane shutter 104 are controlled by the shutter control circuit 126 to pick up an image, and the image pickup signal output from the image pickup device 103 is converted into image data by the image processing circuit 125.

(Step S113):
The image data acquired in step S112 is stored in an external medium such as the memory 123 in the camera body 101 or a compact flash (registered trademark), and the process returns to step S104 to shift to a shooting standby state.
(Step S114):
Predetermined termination processing such as saving various data, resetting operation, and power supply system disconnection processing is executed.

  FIG. 6 is a flowchart for explaining an example of the zoom drive operation of the camera according to Embodiment 1 of the present invention.

(Step S121):
The main body CPU 121 determines which of the main body telephoto switch 132 and the main body wide-angle switch 133 is on by the main body operation switch detection circuit 129, and when the main body telephoto switch 132 (main body telephoto button 110T) is in the on state, step S122. If the main body wide-angle switch 133 (main body wide-angle button 110W) is on, the process proceeds to step S123.

(Step S122):
When the main body telephoto button 110T is on, the main body CPU 121 communicates with the lens CPU 221 via the communication circuit 231 and the communication line 232 to instruct zoom driving to the telephoto side.

(Step S124):
The lens CPU 221 detects the current position of the zoom lens 204 by the zoom position detection circuit 225. If the current position is at the telephoto end, the lens CPU 221 returns (ends) without starting zoom driving, and if the current position is not at the telephoto end. Proceed to step S126.

(Step S126):
If it is determined in step S124 that the current position is not the telephoto end, the lens CPU 221 starts zoom drive control to the telephoto side by the zoom position detection circuit 225 and the zoom drive circuit 224.

(Step S123):
On the other hand, if the main body wide-angle button 110W is on (NO) in step S121 described above, the main body CPU 121 communicates with the lens CPU 221 via the communication circuit 231 and the communication line 232 to instruct zoom driving to the wide-angle side. .

(Step S125):
When the main body wide-angle button 110W is on, the lens CPU 221 detects the current position of the zoom lens 204 by the zoom position detection circuit 225. If the current position is at the wide-angle end, the lens CPU 221 returns (ends) without starting zoom driving. If the current position is not at the wide-angle end, the process proceeds to step S127.

(Step S127):
If it is determined in step S125 that the current position is not at the wide-angle end, the lens CPU 221 starts zoom drive control to the wide-angle side by the zoom position detection circuit 225 and the zoom drive circuit 224. Then, the process proceeds to step S128.

(Step S128):
The lens CPU 221 determines whether or not the setting of the operation mode change switch 230 is the electric zoom mode by the lens operation switch detection circuit 227. If the electric zoom mode is set, the process proceeds to step S129. Proceed to S131.

(Step S129):
In the electric zoom mode, the lens CPU 221 determines whether or not the lens telephoto switch 228 (lens telephoto button 207T) is in the on state by the lens operation switch detection circuit 227, and proceeds to step S130 if it is in the off state. If it is on, the process proceeds to step S133.

(Step S130):
If it is determined in step S129 that the lens telephoto button 207T is off, the lens CPU 221 determines whether the lens wide-angle switch 229 (lens wide-angle button 207W) is on by the lens operation switch detection circuit 227, and is in the off state. If YES in step S131, the process proceeds to step S131. If ON, the process proceeds to step S132.

(Step S131):
If it is determined in step S128 that the zoom mode is not the electric zoom mode, or if both the lens telephoto button 207T and the lens wide-angle button 207W are determined to be off, the lens CPU 221 is present when the zoom drive speed is the normal speed. The zoom drive circuit 224 is controlled so that the zoom drive state is maintained, and when the zoom drive speed is increased or decelerated, the normal speed is restored.

(Step S132):
If it is determined in step S130 that the lens wide-angle button 207W is on, the lens CPU 221 is slower than the normal speed when the zoom drive speed is the normal speed or in the accelerated state, for example, ½ times the normal speed. The zoom drive circuit 224 is controlled so that the current zoom drive state is maintained if the zoom drive circuit 224 is already decelerated.

(Step S133):
When it is determined in step S129 that the lens telephoto button 207T is on, the lens CPU 221 sets the zoom drive speed to be higher than the normal speed when the zoom drive speed is in the normal speed or in the decelerated state, for example, twice the normal speed. The zoom drive circuit 224 is controlled, and if the speed is already increased, the current zoom drive state is maintained.

(Step S134):
The lens CPU 221 detects the current position of the zoom lens 204 by the zoom position detection circuit 225. If the current position is the telephoto end when driving in the telephoto direction or the wide-angle end when driving in the wide-angle direction, the process proceeds to step S137. In this case, the process proceeds to step S135.

(Step S135):
If it is determined in step S134 that the current position is neither the telephoto end nor the wide-angle end, the main body CPU 121 causes the main body operation switch detection circuit 129 to select either the main telephoto switch 132 or the main body wide-angle switch 133 at the start of the current zoom drive. It is determined whether or not the on state of the switch that has been in the on state continues. If the switch has changed to the off state, the process proceeds to step S136, and if the on state continues, the process returns to step S128.

(Step S136):
If it is determined in step S135 that the main body zoom operation button 109 is off, the main body CPU 121 communicates with the lens CPU 221 via the communication circuit 231 and the communication line 232 to instruct to stop zoom driving.
(Step S137):
Upon receiving an instruction to stop zoom driving from the main body CPU 121, the lens CPU 221 stops zoom driving by the zoom driving circuit 224 and returns.

  In this embodiment, when an electric zoom type interchangeable lens 201 having an electric zoom operation unit is attached to a camera main body 101 having an electric zoom operation unit, a main body zoom operation button 109 which is a zoom operation unit on the camera main body 101 side. A normal zoom operation function is assigned to the zoom operation button 206, which is the zoom operation unit on the interchangeable lens 201 side, and a zoom speed change function is assigned to the camera body 101 and the interchangeable lens 201. It may be.

Further, although the zoom operation at the time of still shooting has been described in the present embodiment, the same operation may be performed during moving image shooting.
In order to prevent the recording of the zoom drive sound during normal movie shooting and to shoot high-quality images by smoothly changing the angle of view, zoom drive is performed at a lower speed compared to still shooting. Like to do.

  In that case, when performing high-speed zoom driving by simultaneous operation of the zoom operation units (the lens zoom operation button 206 and the main body zoom operation button 109) of the interchangeable lens 201 and the camera main body 101, the zoom drive speed is higher than the quietness and quality. High-speed zoom drive equivalent to that at the time of still shooting may be performed with emphasis on.

  As described above, according to the first embodiment, the electric zoom type interchangeable lens 201 having the lens zoom operation button 206 as the electric zoom operation unit has the main body zoom operation button 109 as the electric zoom operation unit. When attached to the camera body 101, the normal zoom operation enables only one zoom operation unit (main body zoom operation button 109 or lens zoom operation button 206), and the other zoom operation unit (main body zoom operation button 109 or lens). For example, a zoom speed changing function is assigned to the zoom operation button 206).

  As a result, it is possible to prevent a system failure due to an inconsistency between the operation units of the camera body 101 and the interchangeable lens 201, and zooming to the redundant operation unit (in this case, the lens zoom operation button 206). By assigning another function other than the operation function, the zoom function can be diversified.

(Embodiment 2)
FIG. 7 is a flowchart for explaining an example of the still photographing operation of the camera according to Embodiment 2 of the present invention.
FIG. 8 is a rear view for explaining an example of the zoom drive speed setting menu screen of the camera according to Embodiment 2 of the present invention.
9A and 9B are rear views for explaining an example of the preset zoom position setting menu screen of the camera according to Embodiment 2 of the present invention.

  The difference between the second embodiment and the first embodiment is that when the interchangeable lens 201 having the lens zoom operation button 206 is connected to the camera body 101, the lens zoom operation button 206 (lens) of the interchangeable lens 201 is used. As an operation when the telephoto button 207T or the wide-angle lens button 207W) is operated, a function for automatically driving the zoom lens 204 with the telephoto end frequently used or the wide-angle end set as the preset position of the zoom lens 204 is assigned. This is the point.

The basic configuration and shooting operation of the interchangeable lens according to the second embodiment and the camera main body 101 are the same as those in the first embodiment, and therefore, only the outline of the common parts is described.
An example of the preset zoom drive operation of the second embodiment will be described with reference to the flowchart of FIG.
(Step S201 to Step S205):

  Similar to steps S101 to S105 in FIG. 5 of the first embodiment, the detection of the interchangeable lens, the determination of the interchangeable lens type, the initial setting, the power-on state confirmation, and the like are performed.

(Step S206):
The main body CPU 121 determines whether or not the main body telephoto switch 132 (main body telephoto button 110T) of the camera main body 101 is in the on state by the main body operation switch detection circuit 129. If the main body CPU 121 is in the on state, the process proceeds to step S207. If there is, the process proceeds to step S208.

(Step S207):
When the main body telephoto button 110T is on, the main body CPU 121 instructs the lens CPU 221 to zoom to the telephoto side via the communication circuit 231 and the communication line 232, and the lens CPU 221 uses the zoom position detection circuit 225 and the zoom drive circuit 224 to perform telephoto. Zoom drive control to the side.

  At this time, the lens CPU 221 ends the zoom drive control when the zoom position detection circuit 225 detects that the position of the zoom lens 204 is at the telephoto end or receives a zoom drive stop instruction from the main body CPU 121. .

(Step S208):
The main body CPU 121 determines whether or not the main body wide-angle switch 133 (main body wide-angle button 110W) of the camera main body 101 is in the on state by the main body operation switch detection circuit 129. If the main body CPU 121 is in the on state, the process proceeds to step S209. If there is, the process proceeds to step S210.

(Step S209):
When it is determined in step S208 that the main body wide-angle button 110W is on, the main body CPU 121 instructs the lens CPU 221 to zoom to the wide-angle side via the communication circuit 231 and the communication line 232, and the lens CPU 221 includes the zoom position detection circuit 225, Zoom drive circuit 224 performs zoom drive control to the wide angle side.

  At this time, the lens CPU 221 ends the zoom drive control when the zoom position detection circuit 225 detects that the position of the zoom lens 204 is at the wide-angle end or receives a zoom drive stop instruction from the main body CPU 121. .

(Step S210):
The lens CPU 221 determines whether or not the lens telephoto switch 228 (lens telephoto button 207T) of the interchangeable lens 201 is in the on state by the lens operation switch detection circuit 227. If it is in the on state, the process proceeds to step S211 and is in the off state. In this case, the process proceeds to step S212.

(Step S211):
If it is determined in step S210 that the lens telephoto button 207T is on, the lens CPU 221 performs zoom drive control to the telephoto end by the zoom position detection circuit 225 and the zoom drive circuit 224, and the zoom position detection circuit 225 controls the position of the zoom lens 204. When it is detected that has reached the telephoto end, the zoom drive control is terminated.

At this time, even if the lens operation switch detection circuit 227 detects that the lens telephoto switch 228 has been turned off, the zoom drive control is continued until the position of the zoom lens 204 reaches the telephoto end.
Further, the zoom drive speed is controlled to be higher than the normal zoom drive speed of the main body zoom operation button 109 (main body telephoto button 110T, main body wide-angle button 110W) of the camera main body 101. For example, the normal drive speed The drive control may be performed at the maximum speed that can be driven.
Alternatively, in the zoom drive speed setting menu of the camera body 101 when the photographer automatically zooms to the telephoto end or the wide-angle end as shown in FIG. 8 described later, the upper button 141a, the lower button 141b, By operating the selection dial 143, for example, the ratio of the normal driving speed reference that is changed in display at a pitch of 0.1 times is selected, and the drive control is performed at an arbitrary speed determined by the determination button 142. Good.

(Step S212):
The lens CPU 221 determines whether or not the lens wide-angle switch 229 (lens wide-angle button 207W) of the interchangeable lens 201 is in the on state by the lens operation switch detection circuit 227. If the lens CPU 221 is in the on state, the process proceeds to step S213. In this case, the process proceeds to step S214.

(Step S213):
If it is determined in step S212 that the lens wide-angle button 207W is on, the lens CPU 221 performs zoom drive control to the wide-angle end by the zoom position detection circuit 225 and the zoom drive circuit 224, and the zoom position detection circuit 225 controls the position of the zoom lens 204. When it is detected that has reached the wide angle end, the zoom drive control is terminated.

  At this time, even if the lens operation switch detection circuit 227 detects that the lens wide-angle switch 229 has been turned off, the zoom drive control is continued until the position of the zoom lens 204 reaches the wide-angle end. As for the zoom drive speed, high-speed drive similar to the drive to the telephoto end in step S211 is performed.

(Step S214 to Step S219, Step S220):
As in step S108 to step S113 and step S114 of the first embodiment, state detection, imaging, image data storage, end processing, and the like of AE, AF, 1R switch 130, and 2R switch 131 are performed.

  In the second embodiment, when an electric zoom type interchangeable lens 201 having an electric zoom operation unit (lens zoom operation button 206) is attached to a camera body 101 having an electric zoom operation unit (main body zoom operation button 109), A normal zoom operation function is assigned to the zoom operation unit on the camera body 101 side, and a function for driving the telephoto end or the wide angle end as a preset position is assigned to the zoom operation unit on the interchangeable lens 201 side. The functions assigned to 101 and the interchangeable lens 201 may be reversed.

  Further, although the zoom operation at the time of still shooting has been described in the present embodiment, the same operation may be performed during moving image shooting. In that case, in order to prevent the zoom drive sound from being recorded in normal movie shooting, or to shoot high quality images by smoothly changing the angle of view, it is slower than in still shooting. The zoom drive is performed.

  However, the present invention is not limited to this, and when the zoom lens 204 is automatically driven to the telephoto end or the wide-angle end during moving image shooting, the zoom driving speed is more important than the quietness and the quality at the time of still shooting. Equivalent high speed zoom drive may be performed.

  Or, contrary to the description in the present embodiment, the automatic driving of the zoom lens 204 to the telephoto end or the wide-angle end at the time of moving image shooting is slower than at the time of still shooting with emphasis on quietness and quality. You may make it carry out.

An example of the zoom drive speed setting menu screen of the camera according to the second embodiment will be described with reference to FIG.
A display monitor 105 is provided on the back surface of the camera body 101 of the present embodiment. In the periphery of the display monitor 105, a main body telephoto button 110T and a main body wide-angle button 110W that constitute the main body zoom operation button 109, and a selection dial 143 are provided.

  Further, a selection button 141 is provided so as to surround the determination button 142. The selection button 141 includes an upper button 141a, a lower button 141b, a left button 141c, and a right button 141d arranged on the upper, lower, left, and right sides of the determination button 142.

The upper button 141a, the lower button 141b, the left button 141c, and the right button 141d are used to select setting items and setting values of various shooting menus and setting menus.
The decision button 142 is used to decide a setting item, a setting value, or the like selected by the selection button 141 (up button 141a, down button 141b, left button 141c, right button 141d).

  The selection dial 143 is a dial for selecting setting items, setting values, and the like in the same manner as the selection button 141.

  The screen display of the display monitor 105 is a zoom drive speed selection screen. When the upper button 141a, the lower button 141b, or the selection dial 143 is operated, for example, at x0.1 pitch,..., X0.8, The display in the speed ratio display frame 105a is changed such as × 0.9, × 1.0, × 1.1, × 1.2,.

  As another modification, the preset position of the zoom lens 204 is not the telephoto end or the wide angle end, but a preset position registered in the camera body 101 or a preset position arbitrarily set by the photographer. Good.

  In addition, if the zoom function assignment can be changed with the menu of the camera body 101 and the like, and the preset zoom drive of the zoom lens 204 is assigned to the interchangeable lens 201 side, the telephoto end or wide angle end, the camera body 101 side When assigned to the preset position, a preset position that is fixed or arbitrarily set may be set as the drive destination.

FIG. 9A shows an example of a setting menu screen when the current zoom position is assigned to the zoom operation unit of the camera body as a preset position.
The screen display of the display monitor 105 is a button selection screen 105 b for assigning a preset position of the zoom lens 204.

  When the upper button 141a, the lower button 141b, or the selection dial 143 is operated while the selection screen 105b is displayed, for example, a thick frame indicating that either the main body telephoto button 110T or the main body wide-angle button 110W is selected. The display 105c moves up and down.

  When the determination button 142 is pressed while the “W button” (main body wide-angle button 110W) or “T button” (main body telephoto button 110T) is selected in the thick frame display 105c, the preset position can be selected as a button to be assigned. it can.

FIG. 9B shows an example of a setting menu screen when the photographer selects a focal length to be set at the preset position.
The screen display of the display monitor 105 is a focal length selection screen. When the upper button 141a, the lower button 141b, or the selection dial 143 is operated, for example, at a pitch of 2 mm,..., 46 mm, 48 mm, 50 mm, 52 mm, 54 mm The display in the focal length display frame 105d is changed as in.
The position of the focal length displayed in the focal length display frame 105d becomes the preset position of the zoom lens 204.

  As another method, the preset position can be arbitrarily set using the preset zoom setting menu of the camera body 101 as shown in FIG. 9A with the zoom position of the zoom lens 204 moved to the position to be preset. The photographer may select the current zoom position by operating the upper button 141a, the lower button 141b, or the selection dial 143, and may be determined by the determination button 142.

  Alternatively, the focal length desired to be set in the preset zoom setting menu as shown in FIG. 9B is changed by, for example, a 2 mm pitch when the photographer operates the upper button 141a, the lower button 141b, or the selection dial 143. A setting method or the like that assigns to the zoom operation unit similar to the above may be employed after selecting from among the focal lengths and determining with the determination button 142.

  As described above, according to the second embodiment, the interchangeable lens 201 of the electric zoom type having the electric zoom operation unit (lens zoom operation button 206) has the camera having the electric zoom operation unit (main body zoom operation button 109). When mounted on the main body 101, the normal zoom operation enables only one electric zoom operation unit and assigns a preset zoom drive function to the other electric zoom operation unit. The zoom function of the interchangeable lens 201 can be diversified while preventing a system failure due to competition of the zoom operation button 109 or the like.

  Further, by assigning the redundant lens zoom operation button 206 to the zoom operation of the zoom lens 204 to the wide-angle end or the telephoto end with respect to the main body zoom operation button 109, the operability of the camera main body 101 is improved.

(Embodiment 3)
FIG. 10 is a flowchart for explaining an example of the still photographing operation of the camera according to Embodiment 3 of the present invention.
The difference between the third embodiment and the first embodiment is that when the interchangeable lens 201 having the lens zoom operation button 206 is connected to the camera body 101, the lens zoom operation button 206 ( As an operation when the lens telephoto button 207T and the lens wide-angle button 207W) are operated, a so-called auto zoom function for driving the zoom lens 204 to a position where the photographing magnification becomes a predetermined magnification is assigned.

  Since the basic configuration and photographing operation of the interchangeable lens according to the third embodiment and the camera body are the same as those of the first embodiment, only the outline of the common parts will be described.

With reference to FIG. 10, an example of the still photographing operation of the camera according to the third embodiment will be described.
(Step S301 to Step S309):
Similar to steps S201 to S209 in the second embodiment described above, the detection of the interchangeable lens, the determination of the interchangeable lens type, the initial setting, the power-on state confirmation, the normal zoom drive control by the zoom operation on the camera body, and the like are performed. .

(Step S310):
The lens CPU 221 determines whether or not the lens telephoto switch 228 (lens telephoto button 207T) of the interchangeable lens 201 is in the on state by the lens operation switch detection circuit 227. If it is in the on state, the process proceeds to step S311 and is in the off state. If so, the process proceeds to step S313.

(Step S311):
If it is determined in step S310 that the lens telephoto button 207T is on, AF for acquiring subject distance information used during auto zooming is executed. A known face detection process may be executed at the same time by using face size information during auto-zooming.

(Step S312):
Based on the focus position of the focus adjustment lens 203 as the AF result in step S310, the lens CPU 221 zooms from the subject distance obtained from the distance table data and the like corresponding to the position of the focus adjustment lens 203 and a pre-specified shooting magnification. The target position for driving is calculated.

For example, if the subject distance L is 2 m and the designated shooting magnification M is 1/50, the target position (focal length Lf) is
Lf = L × M = 2000/50 = 40 mm
It becomes.
When auto-zooming is performed using the face detection result in step S310, the zoom drive target position is calculated from the detected face size, the current zoom position, and the designated shooting magnification.

For example, when the horizontal length W1 of the face on the image sensor obtained from the pixel area of the detected face is 1.4 mm and the current zoom position Lz (focal length) is 20 mm, the standard face side Assuming that the length W0 in the direction is 140 mm, the subject distance L is
L = Lz × W0 / W1 = 20 × 140 / 1.4 = 2000 mm
If the designated photographing magnification M is 1/40, the target position (focal length Lf) is
Lf = L × M = 2000/40 = 50 mm
It becomes.

The method for obtaining the target position is not limited to the above two methods. For example, the target position corresponding to the designated photographing magnification is obtained, for example, the average of the positions obtained by the above two methods is used as the target position. If it is.
Then, zoom drive control to the target position is performed by the zoom position detection circuit 225 and the zoom drive circuit 224 to the average position of the obtained target positions.

  Here, the imaging magnification may be specified by fixing the lens telephoto button 207T at the time of manufacturing the interchangeable lens 201, or may be set in the auto zoom setting menu of the camera body 101 similar to FIGS. 9A and 9B. The photographer may be able to set the shooting magnification by selecting a desired shooting magnification and selecting one of the two zoom operation buttons.

  Further, the zoom drive speed is controlled to be higher than the normal zoom drive speed of the main body zoom operation button 109 (main body telephoto button 110T, main body wide-angle button 110W) of the camera main body 101. For example, the normal drive speed The drive control may be performed at the maximum speed that can be driven at the maximum speed, or the photographer may perform the drive control at an arbitrary speed that is selected and determined by the auto zoom drive speed setting menu of the camera body 101 similar to FIG. It may be.

(Step S313):
The lens CPU 221 determines whether or not the lens wide-angle switch 229 (lens wide-angle button 207W) of the interchangeable lens 201 is in the on state by the lens operation switch detection circuit 227. If the lens CPU 221 is in the on state, the process proceeds to step S314. If so, the process proceeds to step S315.

(Step S314):
As in step S311, autofocus (AF) for auto-zooming, face detection processing, and the like are executed.

(Step S315):
As in the case where the lens telephoto button 207T is operated in step S312, drive control to the zoom position corresponding to the photographing magnification set for the lens wide-angle button 207W is performed.

(Step S316 to Step S321, Step S322):
As in step S214 to step S219 and step S220 of the second embodiment, AE, AF, 1R switch 130, 2R switch 131 state detection, imaging, image data storage, termination processing, and the like are performed.

  In Embodiment 3, when an electric zoom type interchangeable lens 201 having an electric zoom operation unit (lens zoom operation button 206) is attached to a camera body 101 having an electric zoom operation unit (main body zoom operation button 109), A normal zoom operation function is assigned to the zoom operation unit (main body zoom operation button 109) on the camera body 101 side, and an auto zoom function is assigned to the zoom operation unit (lens zoom operation button 206) on the interchangeable lens 201 side. The functions assigned to the camera body 101 and the interchangeable lens 201 may be reversed.

In the third embodiment, the zoom operation at the time of still shooting has been described. However, the same operation may be performed during moving image shooting.
In order to prevent the recording of the zoom drive sound during normal movie shooting and to shoot high-quality images by smoothly changing the angle of view, zoom drive is performed at a lower speed compared to still shooting. However, when auto-zoom is performed, high-speed zoom drive equivalent to that at the time of still shooting may be performed with an emphasis on the zoom drive speed rather than silence and quality.

  Or, contrary to the description in the third embodiment, the auto-zoom at the time of moving image shooting may be performed at a lower speed than at the time of still shooting with emphasis on quietness and quality.

  As described above, according to the third embodiment, the electric zoom type interchangeable lens 201 having the electric zoom operation unit (lens zoom operation button 206) has the electric zoom operation unit (main body zoom operation button 109). When mounted on the main body 101, the normal zoom operation is effective only for one electric zoom operation unit, and an auto zoom function is assigned to the other electric zoom operation unit. The zoom function can be diversified while preventing a system failure due to competition of the operation buttons 109 or the like.

  Also, by assigning an auto zoom function to the redundant lens zoom operation button 206, zoom movement of the zoom lens 204 to an arbitrary magnification can be realized simply and at high speed, and the operability of the camera body 101 is improved. .

(Embodiment 4)
FIG. 11 is a flowchart for explaining an example of the still photographing operation of the camera according to Embodiment 4 of the present invention.
The difference between the fourth embodiment and the first embodiment is that when the interchangeable lens 201 having the lens zoom operation button 206 is connected to the camera body 101, the lens zoom operation button 206 ( As an operation function of the lens telephoto button 207T and the lens wide-angle button 207W), a so-called inter-exposure zoom function for performing zoom driving during exposure to the image sensor is assigned.

  Since the basic configuration and photographing operation of the interchangeable lens according to the fourth embodiment and the camera body are the same as those of the first embodiment, only the outline of the common parts is shown.

With reference to FIG. 11, an example of the still photographing operation of the camera according to Embodiment 4 of the present invention will be described.
(Step S401 to Step S413):
Similar to steps S201 to S209 and steps S214 to S217 in the second embodiment described above, detection of an interchangeable lens, determination of an interchangeable lens type, initial setting, confirmation of power-on state, and normal operation by zoom operation on the camera body Zoom drive control, AE, AF, 1R switch 130, 2R switch 131 state detection, and the like.

(Step S414):
The lens CPU 221 determines whether or not the lens telephoto switch 228 (lens telephoto button 207T) of the interchangeable lens 201 is in the on state by the lens operation switch detection circuit 227. If it is in the on state, the process proceeds to step S416 and is in the off state. If so, the process proceeds to step S415.

(Step S416):
If it is determined in step S414 that the lens telephoto button 207T is on, the lens CPU 221 starts zoom driving to the telephoto side by the zoom position detection circuit 225 and the zoom drive circuit 224.
At this time, even if it is detected by the lens operation switch detection circuit 227 that the lens telephoto switch 228 has been turned off, the zoom driving is performed until the imaging in step S418 is completed as long as the position of the zoom lens 204 does not reach the telephoto end. Continue control.

  The drive start timing may be before the start of the imaging operation by the main body CPU 121 in step S418, but when the driving of the diaphragm 205 is started or completed by the aperture driving circuit 226 according to the aperture drive instruction from the main body CPU 121 during the imaging operation. You may make it start zoom drive at timings, such as a time point.

  Further, with respect to the zoom drive speed, even if drive control is performed at a fixed speed, the zoom speed is the same as the normal zoom drive speed of the main body zoom operation button 109 (main body telephoto button 110T, main body wide-angle button 110W) of the camera main body 101. Alternatively, the drive control may be performed at an arbitrary speed selected and determined by the photographer in the zoom exposure speed setting menu during exposure of the camera body 101 similar to that in FIG.

(Step S415):
When it is determined in step S414 that the lens telephoto button 207T is off, the lens CPU 221 determines whether the lens wide-angle switch 229 (lens wide-angle button 207W) of the interchangeable lens 201 is on by the lens operation switch detection circuit 227. If it is in the on state, the process proceeds to step S417. If it is in the off state, the process proceeds to step S418.

(Step S417):
When it is determined in step S415 that the lens wide angle switch 229 (lens wide angle button 207W) is on, the lens CPU 221 uses the zoom position detection circuit 225 and the zoom drive circuit 224 in the same manner as the zoom drive to the telephoto side in step S416. Start zooming to the wide angle side.

(Step S418):
Imaging is performed in the same manner as in step S218 in the second embodiment.
(Step S419):
When the imaging in step S418 is completed, the lens CPU 221 stops zoom driving by the zoom driving circuit 224.

(Steps S420 to S421):
Similar to steps S219 to S220 in the second embodiment, image data storage, termination processing, and the like are performed.

  In the fourth embodiment, when an electric zoom type interchangeable lens 201 having an electric zoom operation unit is attached to a camera main body 101 having an electric zoom operation unit, a normal zoom operation function is provided on the zoom operation unit on the camera main body 101 side. Are assigned to the zoom operation unit on the interchangeable lens 201 side, but the functions assigned to the camera body 101 and the interchangeable lens 201 may be reversed.

As described above, according to the fourth embodiment, the electric zoom type interchangeable lens 201 having the electric zoom operation unit (lens zoom operation button 206) has the electric zoom operation unit (main body zoom operation button 109). When mounted on the main body 101, the normal zoom operation enables only one electric zoom operation unit, and the other zoom operation unit is assigned a zoom function between exposures.

As a result, while avoiding system failure due to competition between the lens zoom operation button 206 and the main body zoom operation button 109, the redundant lens zoom operation button 206 or the main body zoom operation button 109 is used to perform zooming between exposures, etc. It is possible to easily realize advanced photographing techniques and realize a variety of zoom functions.

In addition, the assignment of the zoom function in each embodiment described above does not have to be fixed, and the photographer can assign a function other than the normal zoom operation by the zoom function assignment menu of the camera body 101. It may be configured to be arbitrarily set by a method such as selecting with.
Needless to say, the present invention is not limited to the configuration exemplified in the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 Camera system 101 Camera main body 102 Camera control circuit 103 Image pick-up element 104 Focal plane shutter 105 Display monitor 105a Speed ratio display frame 105b Selection screen 105c Thick frame display 105d Focal length display frame 106 Strobe 107 Release button 108 Battery 109 Main body zoom operation button 110T body telephoto button 110W body wide angle button 121 body CPU
122 Non-volatile memory 123 Memory 124 Image sensor control circuit 125 Image processing circuit 126 Shutter control circuit 127 Display circuit 128 Strobe control circuit 129 Main unit operation switch detection circuit 130 1R switch (first release switch)
131 2R switch (second release switch)
132 Main body telephoto switch 133 Main body wide angle switch 134 Power supply circuit 135 Control program 141 Selection button 141a Upper button 141b Lower button 141c Left button 141d Right button 142 Determination button 143 Selection dial 201 Interchangeable lens 202 Lens control circuit 203 Focus adjustment lens 204 Zoom lens 205 Aperture 206 Lens zoom operation button 207T Lens telephoto button 207W Lens wide-angle button 208 Operation mode change lever 221 Lens CPU
222 Lens drive circuit 223 Lens position detection circuit 224 Zoom drive circuit 225 Zoom position detection circuit 226 Aperture drive circuit 227 Lens operation switch detection circuit 228 Lens telephoto switch 229 Lens wide angle switch 230 Operation mode change switch 231 Communication circuit 232 Communication line B1 Body side State B1-1 Body side output B2 Body side state B2-1 Body side output B2-2 Body side output B2-3 Body side output B3 Body side state B3-1 Body side output B4 Body side state B4-1 Body side output B4 -2 Body side output L1 Lens side state L2 Lens side state L2-1 Lens side output L3 Lens side state L4 Lens side state L5 Lens side state L5-1 Lens side output L6 Lens side state L7 Lens side state

Claims (16)

An interchangeable lens having a lens-side zoom operation means for performing an electric zoom operation with electric zoom operation of the photographic lens is replaceably mounted, and a camera body side for performing the electric zoom operation of the interchangeable lens A camera body having a zoom operation means;
When the interchangeable lens is mounted on the camera body, an electric zoom operation function is assigned to one of the camera body side zoom operation means and the lens side zoom operation means, and an auxiliary function of the electric zoom operation is assigned to the other. Control means;
A camera system comprising: The camera system according to claim 1,
The camera system, wherein the control means assigns the electric zoom operation function to one of the camera body side zoom operation means and the lens side zoom operation means, and assigns a zoom drive speed changing function to the other. The camera system according to claim 1,
The control means assigns the electric zoom operation function to one of the camera body side zoom operation means and the lens side zoom operation means, and assigns an automatic drive function to a predetermined zoom position to the other. system. The camera system according to claim 1,
2. The camera system according to claim 1, wherein the control means assigns the electric zoom operation function to one of the camera body side zoom operation means and the lens side zoom operation means, and assigns the between-exposure zoom function to the other. The camera system according to claim 1,
The control means assigns the electric zoom operation function to one of the camera body side zoom operation means and the lens side zoom operation means, and assigns a focus lens drive function or an aperture drive function to the other. Camera system. The camera system according to claim 3.
The predetermined zoom position is a telephoto end or a wide-angle end of an interchangeable lens. The camera system according to claim 3.
The predetermined zoom position is a zoom position fixedly set in advance or a zoom position arbitrarily set by a photographer. The camera system according to claim 3.
The camera system characterized in that the predetermined zoom position is a zoom position corresponding to a photographing magnification fixedly set in advance or a zoom position corresponding to a photographing magnification arbitrarily set by a photographer. In a control program for a camera system provided with a camera body side zoom operation means for performing an electric zoom operation of an interchangeable lens in the camera body,
A first step of detecting the mounting of the interchangeable lens having a lens side zoom operation means for performing an electric zoom operation with electric zoom operation of the photographic lens;
When the attachment of the interchangeable lens is detected, a second function assigns an electric zoom operation function to one of the camera body side zoom operation means and the lens side zoom operation means, and assigns an auxiliary function of the electric zoom operation to the other. Steps,
A program for controlling a camera system. In the control program of the camera system according to claim 9,
In the second step, the electric zoom operation function is assigned to one of the camera body side zoom operation means and the lens side zoom operation means, and the zoom drive speed changing function is assigned to the other. Control program. In the control program of the camera system according to claim 9,
A control program for a camera system, wherein the electric zoom operation function is assigned to one of the camera body side zoom operation means and the lens side zoom operation means, and an automatic drive function to a predetermined zoom position is assigned to the other. In the control program of the camera system according to claim 9,
In the second step, the electric zoom operation function is assigned to one of the camera body side zoom operation means and the lens side zoom operation means, and the between-exposure zoom function is assigned to the other. program. In the control program of the camera system according to claim 9,
In the second step, the electric zoom operation function is assigned to one of the camera body side zoom operation means and the lens side zoom operation means, and the focus lens drive function or the aperture drive function is assigned to the other. A camera system control program. In the control program of the camera system according to claim 11,
The control program for a camera system, wherein the predetermined zoom position is a telephoto end or a wide-angle end of an interchangeable lens. In the control program of the camera system according to claim 11,
The predetermined zoom position is a zoom position that is fixedly set in advance or a zoom position that is arbitrarily set by a photographer. In the control program of the camera system according to claim 11,
The control program for a camera system, wherein the predetermined zoom position is a zoom position corresponding to a photographing magnification fixedly set in advance or a zoom position corresponding to a photographing magnification arbitrarily set by a photographer.

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