JP2020013089A - Camera body and interchangeable lens - Google Patents

Abstract

To create instructions to an interchangeable lens by using appropriate information.SOLUTION: A camera body which an interchangeable lens including an optical system is attachable to and detachable from includes: a second communication unit for performing second communication that periodically receives data from the interchangeable lens; a creation unit that creates instructions to the interchangeable lens by using at least the data received by the second communication unit; and a first communication unit that performs first communication with the interchangeable lens and transmits the instructions to the interchangeable lens. The data includes at least one of positional information indicating the position of a mobile member in the interchangeable lens, and a moving state of the mobile member or reliability of the positional information.SELECTED DRAWING: Figure 1

Description

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

  There is known a technique for transmitting information indicating the state of an interchangeable lens to a camera body (see Patent Document 1). However, if the content of the transmitted data is inappropriate, the accuracy of control using the data may be reduced.

JP 2000-105402 A

A camera body according to a first aspect of the present invention is a camera body to which an interchangeable lens including an optical system is detachable, and a second communication unit that performs a second communication for periodically receiving data from the interchangeable lens; Using at least the data received by the second communication unit, a first unit that makes an instruction to the interchangeable lens and the interchangeable lens performs first communication, and transmits the instruction to the interchangeable lens. And a first communication unit, wherein the data includes at least one of position information indicating a position of the moving member in the interchangeable lens, and a moving state of the moving member or reliability of the position information.
An interchangeable lens according to a second aspect of the present invention is an interchangeable lens having an optical system detachable from a camera body, wherein a first member is provided between a movable member movable in the interchangeable lens and the camera body. A first communication unit that performs communication and receives an instruction regarding the movement of the moving member from the camera body, and a second communication unit that performs second communication that periodically transmits data to the camera body. The data includes position information indicating the position of the moving member, and at least one of the moving state of the moving member and the reliability of the position information, and wherein the instruction is the one when the instruction is created. The information includes at least one of a moving state and the reliability.

FIG. 2 is a block diagram illustrating a main configuration of the camera system. FIG. 3 is a diagram illustrating a movement locus of a plurality of focusing lenses. 6 is a timing chart illustrating command data communication and hot line communication. FIG. 5 is a diagram illustrating timing of command data communication. FIG. 3 is a diagram illustrating timing of hotline communication. FIG. 4 is a diagram illustrating information included in hotline data. FIG. 4 is a diagram illustrating a relationship between a focus lens position, a focal length, and a shooting distance. FIG. 3 is a diagram illustrating timing of automatic focus adjustment.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration of a main part of the camera system 1. The interchangeable lens 3 is detachable from the camera body 2 by a bayonet structure. When the camera body 2 and the interchangeable lens 3 are coupled, the terminals provided on the body-side mount and the terminals provided on the lens-side mount are in physical contact with each other and are electrically connected.

<Camera body>
The camera body 2 includes a body-side control unit 230, a body-side communication unit 240, a power supply unit 250, an image sensor 260, a signal processing unit 270, an operation member 280, and a display unit 285.

The image sensor 260 is a solid-state image sensor such as a CMOS image sensor or a CCD image sensor. The imaging element 260 photoelectrically converts the subject image on the imaging surface 260S according to a control signal from the body-side control unit 230 and outputs a signal.
The imaging element 260 has a photoelectric conversion unit for generating an image and a photoelectric conversion unit for focus detection. The imaging pixel signal generated by the image generation photoelectric conversion unit is used by the signal processing unit 270 to generate image data. The pixel signal for detection generated by the photoelectric conversion unit for focus detection is used by the signal processing unit 270 for focus detection processing for detecting the image formation state of the interchangeable lens 3, in other words, the focus of the interchangeable lens 3.

  The signal processing unit 270 performs predetermined image processing on the imaging pixel signal output from the imaging element 260 to generate image data. The generated image data is recorded on a storage medium (not shown) in a predetermined file format, or used for image display by the display unit 285. In addition, the signal processing unit 270 performs a predetermined focus detection process on the detection pixel signal output from the image sensor 260 to determine the amount of defocus (the amount of deviation between the focal position of the interchangeable lens 3 and the image plane 260S). calculate. The signal processing unit 270 is connected to the body-side control unit 230, the image sensor 260, and the display unit 285.

The body-side communication section 240 performs predetermined communication with the lens-side communication section 340 of the interchangeable lens 3. The body side communication section 240 includes a body side first communication section 240a and a body side second communication section 240b. The body-side first communication unit 240a performs command data communication described later, and the body-side second communication unit 240b performs hotline communication described later.
The body-side first communication unit 240a is connected to the body-side control unit 230, and information transmitted from the camera body 2 to the interchangeable lens 3 by command data communication is created by the body-side control unit 230. The body-side second communication unit 240b is connected to the body-side control unit 230, and information transmitted from the interchangeable lens 3 to the camera body 2 by hot line communication is transmitted to the body-side control unit 230.

The body-side control unit 230 includes a microcomputer and its peripheral circuits. The body-side control unit 230 executes a control program stored in the storage unit 235 to control each unit in the camera body 2. The body-side control unit 230 is connected to the body-side communication unit 240, the power supply unit 250, the image sensor 260, the signal processing unit 270, the operation member 280, and the display unit 285.
The body-side control unit 230 includes a storage unit 235. Recording and reading of data in the storage unit 235 are controlled by the body-side control unit 230. The storage unit 235 stores a control program executed by the body-side control unit 230 and the like.
The body-side control unit 230 controls the entire camera body 2 such as image processing and creates an instruction for a moving member included in the interchangeable lens 3. The first body-side control unit 230 is output from the first calculation unit 231 that calculates the position of the focusing lens 361a included in the interchangeable lens 3 based on the information transmitted from the body-side communication unit 240, and is output from the signal processing unit 270. A second calculator 232 for calculating a drive amount of the focusing lens 361a based on the defocus amount and the position of the focusing lens 361a calculated by the first calculator 231.

  The power supply unit 250 converts a voltage of a battery (not shown) into a voltage used in each unit of the camera system 1 and supplies the voltage to each unit of the camera body 2 and the interchangeable lens 3. The power supply unit 250 can switch on and off power supply for each power supply destination according to an instruction from the body-side control unit 230.

An operation member 280 including a release button, an operation switch, and the like is provided on an exterior surface of the camera body 2. By operating the operation member 280, the user issues a shooting instruction, a setting instruction of a shooting condition, and the like. The operation member 280 sends an operation signal according to a user's operation to the body-side control unit 230.
The display unit 285 is configured by, for example, a liquid crystal display panel. The display unit 285 displays an image based on the image data processed by the signal processing unit 270, an operation menu screen, and the like in accordance with an instruction from the body-side control unit 230.

<Interchangeable lens>
The interchangeable lens 3 includes a lens-side control unit 330, a lens-side communication unit 340, a lens-side storage unit 350, an imaging optical system 360, a lens driving unit 370, a zoom operation ring 375, and an aperture driving unit 380.

  The lens-side controller 330 includes a microcomputer and its peripheral circuits. The lens-side control unit 330 controls each unit of the interchangeable lens 3 by executing a control program stored in the lens-side storage unit 350. The lens-side control unit 330 is directly or indirectly connected to the lens-side communication unit 340, the lens-side storage unit 350, the lens driving unit 370, the zoom operation ring 375, and the aperture driving unit 380.

  The lens-side storage unit 350 is configured by a nonvolatile storage medium. Recording and reading of data in the lens side storage unit 350 are controlled by the lens side control unit 330. The lens-side storage unit 350 stores data indicating the model name of the interchangeable lens 3, data indicating the optical characteristics of the imaging optical system 360, and the like, in addition to storing a control program and the like executed by the lens-side control unit 330. Can be. As an example of the optical characteristics, the position of the focusing lens 361a in the optical axis O direction according to the focal length and the photographing distance, and the like are given.

The imaging optical system 360 forms a subject image on an imaging plane (imaging plane 260S). The optical axis O of the imaging optical system 360 substantially coincides with the center position of the imaging surface 260S. At least a part of the imaging optical system 360 is configured to be movable as a moving member in the interchangeable lens 3.
The imaging optical system 360 includes, for example, a focusing lens 361a as a moving member, a zoom lens 361c as a moving member, and an aperture 362.
The lens driving section 370 moves the moving member, and includes lens driving sections 370a and 370c. Each of the lens driving units 370 includes an actuator, a driving mechanism, and a position detecting unit of a moving member. In the present embodiment, the position information of the moving member is periodically created based on signals from the position detection unit of the lens driving unit 370 and the actuator. In addition, based on signals from the position detection unit and the actuator of the lens driving unit 370, a moving state such as whether or not the moving member is being driven to move, the moving direction of the moving member, and whether or not the moving member is stopped. Are periodically recognized. The period in which the position information of the moving member is created and the period in which the moving state of the moving member is recognized can be shorter than the period of the hot line communication.

The focusing lens 361a is configured to be able to move forward and backward in the optical axis O direction by a lens driving unit 370a. By moving the focusing lens 361a, the focal position of the imaging optical system 360 is adjusted. The driving instruction such as the moving direction, the moving amount, and the moving speed of the focusing lens 361a may be based on an instruction from the body-side control unit 230, and the lens-side control unit 330 considers the instruction from the body-side control unit 230. It may be instructed. When a stepping motor and an origin detection unit are used for the lens driving unit 370a, the position of the focusing lens 361a is configured to be detectable based on the pulse number (movement amount) of the stepping motor and the detection result of the origin detection unit.
In FIG. 1, one focusing lens 361a is used. However, as shown in FIG. 2, a plurality of focusing lenses 363 and 364 may be moved to adjust the focal position of the imaging optical system 360. In that case, a plurality of lens driving units 370a for driving the focusing lenses 363 and 364 in the optical axis O direction may be provided. FIG. 2 shows the positions of the focusing lenses 363 and 364 when the shooting distance at the focal lengths W to M (W <M <T) is infinity. In FIG. 2, the positions of the focusing lenses 363 and 364 are indicated by coordinates P (a numerical value corresponding to the shooting distance, a symbol corresponding to the focal length).

  The zoom lens 361c is configured to be able to move forward and backward in the optical axis O direction by the lens driving unit 370c or the zoom operation ring 375. When the zoom lens 361c moves, the focal length of the imaging optical system 360 changes. The moving direction, the moving amount, the moving speed, and the like of the zoom lens 361c depend on the driving force instructed by the lens-side control unit 330 or mechanically transmitted from the zoom operation ring 375. The position of the zoom lens 361c is configured to be detectable by an encoder or the like of the lens driving unit 370c.

  The diaphragm 362 has a plurality of diaphragm blades as a moving member, and adjusts the amount of light incident on the image sensor 260 by an opening formed using the plurality of diaphragm blades. The aperture drive unit 380 is configured by a motor and an aperture drive mechanism, and the aperture 362 is configured to be able to change the aperture diameter (aperture value) by the aperture drive unit 380 and manual operation. The aperture diameter of the diaphragm 362 is configured to be detectable by an encoder or the like of the diaphragm driving unit 380. The position information of the diaphragm blade as the moving member is created as an aperture diameter by the diaphragm driving unit 380 and the lens-side control unit 330.

  The zoom operation ring 375 is provided, for example, on the outer cylinder of the interchangeable lens 3. The user performs a zoom operation to change the focal length of the interchangeable lens 3 with the zoom operation ring 375. An operation signal corresponding to the user's zoom operation may be transmitted from the zoom operation ring 375 to the lens-side control unit 330.

The lens-side communication unit 340 performs predetermined communication with the body-side communication unit 240. The lens-side communication section 340 includes a lens-side first communication section 340a and a lens-side second communication section 340b. The lens-side first communication unit 340a is connected to a terminal for performing command data communication, and the lens-side second communication unit 340b is connected to a terminal for performing hotline communication.
The lens-side first communication unit 340a is connected to the lens-side control unit 330, and information transmitted from the interchangeable lens 3 to the camera body 2 by command data communication is created by the lens-side control unit 330. The lens-side second communication unit 340b is also connected to the lens-side control unit 330, and information transmitted from the interchangeable lens 3 to the camera body 2 by hot line communication is transmitted to the lens-side control unit 330 and the lens-side second communication unit 340b. Created.

An arrow between the lens side communication unit 340 and the body side communication unit 240 in FIG. 1 indicates a signal flow.
The lens-side first communication unit 340a sends a signal (hereinafter, an RDY signal) indicating whether the interchangeable lens 3 can perform command data communication to a body-side first communication unit 240a and a data signal (hereinafter, a DATAL signal). ) Is output. The body-side first communication unit 240a outputs a clock signal (hereinafter, CLK signal) and a data signal (hereinafter, DATAB signal) for command data communication to the lens-side first communication unit 340a.
The lens-side second communication unit 340b outputs a clock signal (hereinafter, HCLK signal) and a data signal (hereinafter, HDATA signal) for hot line communication to the body-side second communication unit 240b.
The hot line communication is one-way data communication from the interchangeable lens 3 to the camera body 2, and the command data communication is two-way data communication between the interchangeable lens 3 and the camera body 2.

<Details of communication>
Since the camera system 1 has two independent communication systems for command data communication and hot line communication, each communication can be performed in parallel. That is, the camera body 2 and the interchangeable lens 3 can start and end hotline communication while performing command data communication. It is also possible to perform command data communication while performing hotline communication. Therefore, the interchangeable lens 3 can continuously transmit data to the camera body 2 by hot line communication even during command data communication. For example, even if the time required for command data communication increases due to an increase in the amount of data, hotline communication can be performed at the required timing.
Further, the camera body 2 can transmit various instructions and requests to the interchangeable lens 3 at any timing by command data communication even while receiving data by hot line communication, Data can be received from the interchangeable lens 3 at an arbitrary timing.

FIG. 3 is a timing chart illustrating command data communication and hot line communication.
After instructing the start of hot line communication by command data communication, the camera body 2 periodically receives data from the interchangeable lens 3 by hot line communication after time t1, for example.
The camera body 2 transmits and receives data to and from the interchangeable lens 3 by command data communication. Specifically, the camera body 2 receives various data instructed to be transmitted to the interchangeable lens 3 from time t2 to t3 and from time t9 to t10, and exchanges the data from time t5 to t6 and from time t12 to t13. Various kinds of data are transmitted to the lens 3, and at times t4, t7, t8, and t11 between the data, instructions relating to the movement control of the movable member, such as a shake correction start instruction, an aperture drive instruction, and a focus drive instruction, are given. Send to

  In the present embodiment, in the command data communication, there are many types of data to be transmitted and received, and the instruction frequency to the interchangeable lens 3 is high. Further, the time required for transmission / reception is long depending on the type of data, and the time for transmitting / receiving various data from time t2 to t3, time t5 to t6, time t9 to t10, and time t12 to t13 is time t4, It is longer than the time for transmitting the instruction at t7, t8 and t11.

  The interchangeable lens 3 transmits data indicating information (focal length, shooting distance, aperture value, etc.) of the interchangeable lens 3 to the camera body 2 according to an instruction from the camera body 2 sent by command data communication, for example. The interchangeable lens 3 further receives data indicating information (frame rate, setting of the camera body 2, etc.) of the camera body 2 transmitted from the camera body 2.

The command data communication requires a long time for one transmission / reception and the frequency of the transmission / reception is high, so that it is difficult to continuously perform the data communication in a short cycle.
On the other hand, the hot line communication uses a communication terminal different from the communication terminal used for command data communication, so that data communication from the interchangeable lens 3 to the camera body 2 can be continuously performed in a short cycle. For example, the hot line communication can be performed in a desired period from the end of the startup processing of the camera body 2 to the shutoff processing including during the exposure.
The start instruction and the end instruction of the hot line communication are transmitted from the camera body 2 to the interchangeable lens 3 by the command data communication, but are not limited thereto.

<Description of command data communication>
Next, command data communication will be described with reference to FIG. FIG. 4 illustrates the timings of the RDY signal, the CLK signal, the DATAB signal, and the DATA signal.
In one command data communication, one command packet 402 is transmitted from the camera body 2 to the interchangeable lens 3, and then one data packet 406 and 407 is transmitted and received between the camera body 2 and the interchangeable lens 3. Is done.

The lens-side first communication unit 340a sets the potential of the RDY signal to the L level at the start of the command data communication (t21). When the RDY signal is at the L level, the body-side first communication unit 240a starts outputting the CLK signal 401. The frequency of the CLK signal 401 is, for example, 8 MHz. The body-side first communication unit 240a outputs a DATAB signal including a command packet 402 of a predetermined length in synchronization with the clock signal 401. The command packet 402 is indicated by switching between H level and L level. After outputting the CLK signal 401 for a period corresponding to the data length of the command packet 402, the body-side first communication unit 240a thereafter ends the output of the CLK signal (t22).
The command packet 402 includes, for example, synchronization data, data for identifying the order of command data communication, data indicating an instruction from the camera body 2, data indicating the data length of the subsequent data packet 406, communication Includes data for error checking. The instruction included in the command packet 402 includes, for example, an instruction to drive a moving member from the camera body 2 to the interchangeable lens 3, an instruction to transmit data from the camera body 2 to the interchangeable lens 3, and the like.
The interchangeable lens 3 may determine the presence or absence of a communication error based on whether or not the value calculated from the received command packet 402 matches the communication error check data included in the command packet 402.
When the reception of the command packet 402 is completed, the first lens-side communication unit 340a sets the RDY signal to the H level, and the lens-side control unit 330 starts a first control process 404 based on the command packet 402 (t22).

  When the first control process 404 by the lens-side control unit 330 is completed, the lens-side first communication unit 340a can set the RDY signal to the L level (t23). When the input RDY signal goes low, the body-side first communication unit 240a outputs a CLK signal 405.

The body-side first communication unit 240a outputs a DATAB signal including the data packet 406 in synchronization with the CLK signal 405. Further, the lens-side first communication unit 340 a outputs a DATA signal including a data packet 407 of a predetermined length in synchronization with the CLK signal 405. Data packets 406 and 407 are shown by switching between H level and L level. After outputting the CLK signal 405 for a period corresponding to the data length of the data packet 406, the body-side first communication unit 240a thereafter ends the output of the CLK signal (t24).
The data packets 406 and 407 are m-byte variable length data having the number of data indicated by the command packet 402. The data packets 406 and 407 include data for synchronization, data indicating information on the camera body 2, data indicating information on the interchangeable lens 3, data for checking a communication error, and the like.
The data packet 406 transmitted from the camera body 2 to the interchangeable lens 3 includes data indicating a driving amount of the moving member, data for transmitting settings and an operation state in the camera body 2, and the like.
The data packet 407 transmitted from the interchangeable lens 3 to the camera body 2 includes data indicating model name information of the interchangeable lens 3, data indicating a moving state of a moving member in the interchangeable lens 3, a focal length of the interchangeable lens 3, and the like. And data on optical characteristics.
The receiving device (the interchangeable lens 3 or the camera body 2) determines whether or not the value calculated from the received data packets 406 and 407 matches the communication error check data included in the data packets 406 and 407. It is sufficient to determine the presence or absence of a communication error.
When the transmission and reception of the data packets 406 and 407 are completed, the first lens-side communication unit 340a sets the RDY signal to the H level, and the lens-side control unit 330 starts the second control process 408 based on the data packets 406 and 407. (T24).

(Description of First and Second Control Processes)
Next, an example of the first control process 404 and the second control process 408 of the command data communication will be described.
For example, it is assumed that the command packet 402 includes a driving instruction of the focusing lens 361a. The lens-side control unit 330 generates a data packet 407 indicating that the driving instruction of the focusing lens 361a has been received as the first control process 404.

  Next, as a second control process 408, the lens-side control unit 330 issues an instruction to the lens driving unit 370a to move the focusing lens 361a by the movement amount indicated by the data packet 406. Thereby, the movement of the focusing lens 361a in the optical axis O direction is started. When an instruction to move the focusing lens 361a is issued from the lens-side control unit 330 to the lens driving unit 370a, the lens-side first communication unit 340a determines that the second control process 408 has been completed and sets the RDY signal to the L level (t25). .

  Further, for example, it is assumed that the command packet 402 includes an instruction to start hot line communication. The lens-side control unit 330 generates a data packet 407 indicating that the instruction to start the hot line communication has been received as the first control processing 404. Next, as the second control process 408, the lens-side control unit 330 causes the lens-side second communication unit 340b to start hotline communication. When starting the hot line communication, the lens-side first communication unit 340a determines that the second control process 408 has been completed, and sets the RDY signal to the L level (t25).

<Explanation of hotline communication>
Next, the hot line communication will be described with reference to FIG. FIG. 5 illustrates the timing of the HCLK signal and the HDATA signal. In one hotline communication, one HDATA signal 503 is transmitted from the interchangeable lens 3 to the camera body 2 in synchronization with one HCLK signal 502.

  In the camera system 1 according to the present embodiment, it is determined in advance that the interchangeable lens 3 and the camera body 2 are related to the hot line communication before transmitting / receiving the hot line communication start instruction. Regarding the hot line communication, for example, the data length (number of bytes) of the HDATA signal transmitted by one hot line communication, the data to be included in the HDATA signal and its order, the clock frequency and the cycle of the HCLK signal (Tinterval in FIG. 5) And a communication time in one cycle (Ttransmit in FIG. 5). In this embodiment, the frequency of the HCLK signal is 2.5 MHz, the data length of one hot line communication is longer than the command packet 402, the cycle of one hot line communication is 1 millisecond, and the communication time in one cycle is transmission. Less than 75% of the interval, but not limited to. Note that one hot line communication refers to data transmission performed in one cycle of the hot line communication, and from a hot line communication start instruction to a hot line communication end instruction by command data communication from the camera body 2. different.

  First, the operation of the lens-side second communication unit 340b in hotline communication will be described. When receiving an instruction to start hot line communication by command data communication before time t31, the lens-side second communication unit 340b starts outputting the HCLK signal to the camera body 2 (t31). The HCLK signal is periodically output from the interchangeable lens 3, and is shown as HCLK signals 502, 502 ',... In FIG.

The lens-side second communication unit 340b outputs an HDATA signal in synchronization with the HCLK signal. The HDATA signal is indicated by switching between H level and L level. One HDATA signal has a predetermined data length, and is represented in FIG. 5 as having N 1-byte data including 8 bits D0 to D7. One HDATA signal may include an unused bit area or an unused byte area in order to have a fixed length. A predetermined initial value is input to an unused bit area and an unused byte area. The HDATA signal is periodically output from the interchangeable lens 3 in synchronization with the HCLK signals 502, 502 ',..., And is represented as HDATA signals 503, 503',.
When the transmission of the HDATA signal is completed (t32), the lens-side second communication unit 340b stops outputting the HCLK signal until time t34 when transmission of the next HDATA signal starts. One hot line communication is performed from time t31 to t32, and one cycle of hot line communication is performed from time t31 to t34. The lens-side second communication unit 340b starts the second hotline communication from time t34.
The lens-side second communication unit 340b continues the hot-line communication periodically until a command to end the hot-line communication is transmitted from the camera body 2 by the command data communication.

  The lens-side second communication unit 340b transmits the HDATA signals 503, 503 ',... To the body-side second communication unit 240b by a built-in serial communication unit. The lens-side second communication unit 340b efficiently transfers data stored in a data area of a memory (not shown) as an HDATA signal using, for example, a DMA (Direct Memory Access) function. The DMA function is a function for automatically accessing data on a memory without the intervention of a CPU.

  Next, the operation of the body-side second communication section 240b in hotline communication will be described. In the present embodiment, when the body-side second communication unit 240b completes the initialization process at the time of power-on, or determines to transmit a hot-line communication start instruction by command data communication, the HDATA (B) terminal and the HCLK (B) The terminal is put on standby in a receivable state.

  When the transmission of the HDATA signal is started from the interchangeable lens 3 and the reception of the data of the predetermined length is completed (time t33) after a lapse of a predetermined time Terror0 from the start time t31 (time t33), the body-side second communication unit 240b The received data is determined as having been successfully communicated. The predetermined time Terror0 is a time in which a margin is given to the communication time Ttransmit in one cycle, and is, for example, 80% of one cycle. Even after receiving the HDATA signal once, the body-side second communication unit 240b keeps the HDATA (B) terminal and the HCLK (B) terminal in a receivable state, and when one cycle has elapsed from time t31, the next HDATA signal is output. Signal reception is started (t34).

If the reception of data of a predetermined length is not completed within a predetermined time Terror0 from the start of transmission of the HDATA signal by the lens-side second communication unit 340b, the body-side second communication unit 240b cannot perform normal communication. (Communication error) and discard the received data.
In the hot line communication, it is preferable that the communication time (Ttransmit) in one cycle does not exceed 75% so that a communication error process or the like can be performed during each cycle (between time t33 and time t34). is not.

<Hotline data>
The hotline data 90 includes information on the position of the moving member in the interchangeable lens 3 (position information) and information used for controlling the movement of the moving member. These pieces of information are expressed in the form of numerical values or identifiers in the lens-side control unit 330, the lens-side second communication unit 340b, and the like, and are included in the hotline data 90.
Since the hot run data 90 transmitted in one hot line communication includes at least one piece of position information and information used for movement control, the camera body 2 determines the position information and the information used for movement control in one hot line communication. Can be obtained by line communication. Here, for example, when the position information and the information used for movement control are received by separate communications, it is necessary to match the timing at which the position information is created by the camera body 2 with the timing at which the information used for movement control is created. is there. However, according to the present embodiment, since a plurality of pieces of information are transmitted in one hotline communication, the plurality of pieces of information can be easily considered in the camera body 2.

  The hot line data 90 includes, for example, first data 91 relating to the focusing lens 361a. In the present embodiment, information about the focusing lens 361a as a moving member is included in the hotline data 90, but information about other moving members may be included. Further, information about a plurality of moving members (for example, information about the focusing lens 361a and information about the stop 362) may be included in one hotline data 90.

(Description of First Data 91)
FIG. 6 is a diagram illustrating information included in the first data 91.
The first data 91 includes data 91a relating to the position of the focusing lens 361a as position information. The first data 91 includes, as information used for movement control of the focusing lens 361a, data 91b relating to the reliability of the data 91a, data 91c relating to the movement state of the focusing lens 361a, and whether the focusing lens 361a is located at a designed position. At least one of data 91d relating to the operation state, data 91e relating to the operation state of the operation member, and data 91f relating to the operation state in response to the focusing drive instruction. Here, the movement control of the focusing lens 361a is focus drive control or the like, and the information used for the movement control of the focusing lens 361a is information that can be considered when creating a focus drive instruction in the camera body 2. The information used for controlling the movement of the focusing lens 361a may be any information that can affect the result of the automatic focus adjustment, and does not depend on whether or not it is actually considered by the camera body 2.

  The data 91a includes a numerical value indicating position information of the focusing lens 361a in the optical axis O direction detected by the lens driving unit 370a. The position information may be an absolute position of the focusing lens 361a in the optical axis O direction, a relative position such as a moving amount of the focusing lens 361a in the optical axis O direction, or determined from the position of the focusing lens 361a. Shooting distance. The data 91a may include, for example, a value indicating the current position of the focusing lens 361a by associating a value from 0 to 255 with each position from infinity to the closest end of the focusing lens 361a at each focal length. The data 91a can also be represented by the number of pulses output from the lens driving unit 370a, and in that case, the data 91a can be easily created, which is preferable. When the focal position of the imaging optical system 360 is adjusted by the plurality of focusing lenses 363 and 364, the data 91a may be one position information selected from the plurality of focusing lenses 363 and 364. The position information of one virtual lens may be considered in consideration of the positions of the lenses 363 and 364. Even when a plurality of focusing lenses 363 and 364 are provided, the data length of the hot line data 90 can be fixed regardless of the number of focusing lenses by using the position information (data 91a) of one moving member. Therefore, it is not necessary to transmit the number of focusing lenses 363 and 364 to the camera body 2 in order to determine the data length of the hot line data 90.

  The data 91c relates to the moving state of the focusing lens 361a, an identifier indicating whether the focusing lens 361a is moving, an identifier indicating whether the focusing lens 361a is movable, and a moving direction of the focusing lens 361a. , And the like.

The data 91d relates to whether or not the focusing lens 361a is at a designed position, for example, an identifier indicating whether or not zoom tracking is being performed, and priority is given to speed over a designed moving path (moving path at the time of giving priority to optical performance). It includes an identifier indicating whether or not it is moving along the movement trajectory. The designed position of the focusing lens 361 is, for example, a position in the optical axis O direction uniquely obtained from the focal length and the shooting distance. Generally, the interchangeable lens 3 is designed to set a position in the optical axis O direction of the focusing lens 361a in accordance with the focal length and the photographing distance, and to achieve a desired optical performance. However, when the moving speed of the focusing lens 361a is prioritized over the optical performance such as zoom tracking or initialization operation, the focusing lens 361a moves via a position different from the originally set position, and moves along the designed movement trajectory. May have different trajectories. In this case, for example, when the focusing lens 361a is not within the designed movement range (for example, a region below the L0 curve in the graph of FIG. 7), the optical performance of the interchangeable lens 3 may be reduced.
In the present embodiment, during zoom tracking, an identifier indicating that the focusing lens 361a is not at the designed position is uniformly selected to easily select the identifier. However, the present invention is not limited to this. The interchangeable lens 3 can transmit whether or not the focusing lens 361a is at the designed position by hotline communication, and the camera body 2 is not located at the position where the focusing lens 361a is designed, that is, the optical performance. Can be performed in consideration of the possibility of a decrease in

The data 91b includes an identifier indicating whether or not the data 91a is valid with respect to the reliability of the data 91a that is the position information. The body-side control unit 230 can know the reliability of the data 91a (position information) from the data 91b.
When adjusting the focal position with the plurality of focusing lenses 363 and 364, if the relative position of the focusing lenses 363 and 364 in the optical axis O direction is different from the designed position, the lens-side control unit 330 defines the shooting distance. The reliability of the data 91a is reduced. That is, in FIG. 2, when the zoom operation is performed from the focal length W to the focal length T via the focal length M, the moving trajectory of the focusing lens 363 when the optical performance is prioritized matches the moving trajectory when the speed is prioritized. , P (0, W) to P (0, T) via P (0, M), and the numerical value indicating the position in the optical axis O direction remains unchanged at 0. On the other hand, the focusing lens 364 moves from P ′ (0, W) to P ′ (191, M) when the movement trajectory at the time of optical performance priority and the movement trajectory at the time of speed priority do not coincide with each other and moves with speed priority such as zoom tracking. ), And moves to P ′ (0, T), and the numerical value indicating the position in the optical axis O direction changes from 0 to 191. Then, the numerical values indicating the positions in the optical axis O direction do not match between the focusing lens 363 and the focusing lens 364, and the shooting distance cannot be defined. In such a case, the lens-side control unit 330 determines the data 91a to be the upper and lower limits of the limited range, sets the data 91d as an identifier indicating that zoom tracking is being performed, and sets the data 91b as an identifier indicating that position information is invalid. In the present embodiment, when a plurality of focusing lenses 363 and 364 are provided, an identifier indicating invalid position information is selected uniformly by the data 91b during zoom tracking, and the identifier is easily selected. is not.

The data 91e relates to an operation state of an operation member such as the zoom operation ring 375. The operation state of the operation member is represented by an identifier indicating whether the operation member is being operated, an identifier indicating the operation direction of the operation member, an identifier indicating the operation speed of the operation member, and the like. When the zoom operation ring 375 is rotated and the zoom operation is performed, the lens-side control unit 330 selects an identifier indicating that the operation member is being operated and an identifier indicating the operation direction based on the data 91e. It is recognized that the focal length of the imaging optical system 360 has changed by moving in the direction of the optical axis O. The selected data 91e of the lens-side control unit 330 is transmitted by hot line communication, and the focal length recognized by the lens-side control unit 330 is also transmitted by command data communication based on a transmission instruction from the camera body 2. When repeatedly receiving the focal length of the imaging optical system 360 by the command data communication, the body-side control unit 230 indicates that the zoom operation ring 375 is being operated by the hotline communication data 91e during each command data communication. When the identifier is received, the focal length (the numerical values of focal lengths 0 to 5 in FIG. 7) recognized by the body-side control unit 230 is changed in consideration of the identifier indicating the operation direction of the operation member included in the data 91e. It is good also as making it do. As described above, since the body-side control unit 230 also recognizes the change in the focal length by the hot line communication, for example, the table of the focal length to be referred to when creating the focus drive instruction can be made appropriate. The accuracy of various controls can be improved.
Here, when a zoom operation is performed, so-called zoom tracking needs to be performed so as not to change the shooting distance while changing the focal length. FIG. 7 shows the focal length (wide corresponds to 0, tele corresponds to 5), shooting distance (infinity corresponds to L0, close proximity corresponds to L4), and the position of the focusing lens 361a in the optical axis O direction ( (Design value). The lens-side storage unit 350 stores a table indicating the relationship between the shooting distance and the position of the focusing lens 361a in the optical axis O direction for each of the focal lengths 0 to 5. In the present embodiment, the position of the focusing lens 361a in the direction of the optical axis O is represented by a numerical value corresponding to the number of pulses of the lens driving unit 370a. For example, when the focusing lens 361a is at P (0,1) in FIG. 7 before the zoom operation, the lens driving unit 370a moves the focusing lens 361a to P (0,2), P ( 0, 3), ..., etc. As described above, it is necessary to perform zoom tracking when a zoom operation is performed, and there is a possibility that the focusing lens 361a is moved with speed priority during zoom tracking. In this case, for example, if the focusing lens 361a is moved along a straight line connecting P (0,1) and P (0,5) in FIG. 7, it does not pass through the designed position on the curve L0, The optical performance of the imaging optical system 360 may be reduced. However, according to the present embodiment, the camera body 2 can recognize that the zoom operation is being performed by hotline communication, and can recognize that the focusing lens 361a may not be at the designed position.

The data 91f is related to an operation state with respect to the focusing drive instruction, an identifier indicating whether the interchangeable lens 3 is executing the drive instruction, an identifier indicating whether the interchangeable lens 3 is in a state capable of receiving the drive instruction, It is represented by an identifier indicating whether or not the interchangeable lens 3 has completed the drive instruction. In the present embodiment, an identifier indicating a reception disabled state in which a drive instruction cannot be uniformly executed during zoom tracking is selected, but the present invention is not limited to this. According to the present embodiment, the camera body 2 can recognize that the execution of the drive instruction has been completed by the hot line communication of a rapid cycle, and can quickly perform the processing after the execution is completed. The processing after completion of the execution includes, for example, in the case of a focus drive instruction, a process of notifying the user that the subject is in focus after the drive instruction, and the user recognizes that the subject is in focus quickly and performs shutter release. You can prevent missing a chance.
The data 91 may include an ID number or the like for recognizing the drive instruction transmitted by the camera body 2. When the drive of the interchangeable lens 3 is controlled based on a drive instruction from the camera body 2, an ID number or the like included in a command packet 402 of the drive instruction may be included in the data 91. Even when the same type of drive instruction is periodically transmitted from the camera body 2 such as a focus drive instruction, the timing at which the interchangeable lens 3 is operating is transmitted to the camera body 2 based on the output drive instruction. It is possible.

<Explanation of automatic focus adjustment>
Hereinafter, an example of automatic focusing with zoom tracking will be described with reference to FIG. FIG. 8 is a timing chart illustrating the timing of the automatic focus adjustment. FIG. 8 is an example in which the operation of capturing a monitor image called a live view image is repeated at a frame rate of, for example, 1/60 second.
Before the timing chart of FIG. 8, it is assumed that the hot line communication has been started and the hot line data 90 is periodically transmitted from the interchangeable lens 3 to the camera body 2 at times t61, 62,. At time t61 in FIG. 8, it is assumed that the interchangeable lens 3 is executing the focus drive instruction of the operation ID 2, and the user operates the zoom operation ring 375. From time t61, the zoom operation ring 375 continues to be rotated and the shooting distance continues to change. At times t65 and t71, an operation signal of the zoom operation ring 375 is output, and the focal length recognized by the lens-side control unit 330 changes stepwise. Change. In FIG. 8, the distance between the subject and the camera body 2 does not change, and the position of the focusing lens 361a in the direction of the optical axis O is adjusted by zoom tracking accompanying the operation of the zoom operation ring 375. Further, in FIG. 8, since the position information of the data 91a is represented by numerical values from the closest end to the infinite end 255, immediately after the time t65 when the focal length recognized by the lens-side control unit 330 changes stepwise. At (time t65 '), the numerical value of the data 91a greatly changes even if the position of the focusing lens 361a in the optical axis O direction has not changed.

Hereinafter, the reason why the data 91a changes at time t65 'in FIG. 8 will be described with reference to FIG. In FIG. 7, the position of the focusing lens 361a in the direction of the optical axis O is indicated by associating a value from 0 to 255 with each position from infinity to the closest end of the focusing lens 361a at each focal length. Therefore, in P (0,0), P (0,1),..., P (0,5) in FIG. 7, the numerical value included in the data 91a is 0. Similarly, in P (4,0), P (4,1),..., P (4,5) in FIG. 7, the numerical value included in the data 91a is 255.
Until time t64, when the focusing lens 361a is located at the position indicated by P (0, 2) in FIG. 7 with the focal length 2 and the shooting distance L0, the value of the data 91a as the positional information of the focusing lens 361a is It becomes 0. Therefore, the value of the data 91a is 0 until time t64.
Next, when the focal length changes to 1 at time t65 without changing the position of the focusing lens 361a, the value of the data 91a becomes 0 corresponding to P (0, 2) in FIG. To 63 corresponding to P (1, 1), and the numerical value of the data 91a transmitted at the time t65 'rapidly changes. That is, the lens-side control unit 330 recognizes that the shooting distance has changed to L1 with reference to the table of the focal length 1. Then, the lens-side control unit 330 moves the focusing lens 361a to P (0, 1) in which the value of the data 91a is 0 in order to return to the shooting distance L0 before the zoom operation by zoom tracking. Zoom tracking is performed between times t65 'and t66, and the value of the data 91a changes from 63 to 0.
Further, as the cycle of the hot line communication is shifted from the timing of the command data communication, the transmission timing (t65) of the data 91e indicating the detection of the zoom operation and the timing (t65 ′) of the zoom tracking start may be shifted. However, in the case of the present embodiment, since the data 91e can be transmitted in addition to the data 91d and the data 91a indicating the start of the zoom tracking, the camera body 2 can more accurately recognize the zoom tracking operation. .

The signal processing unit 270 performs predetermined image processing on the imaging pixel signal output from the imaging element 260 each time one accumulation is completed, and generates a live view image. Further, the signal processing unit 270 calculates the defocus amount based on the focus detection pixel signal output from the imaging element 260 each time one accumulation is completed, and outputs the calculated defocus amount to the second calculation unit 232.
The first calculator 231 of the body-side controller 230 calculates the position of the focusing lens 361a based on the hot line data 90 transmitted by the hot line communication, and outputs the calculated position to the second calculator 232. The second calculator 232 calculates the driving amount of the focusing lens 361a based on the input defocus amount and the position (current position) of the focusing lens 361a.
Here, in the present embodiment, when the drive amount is calculated based on the focus detection pixel signal output in the accumulation up to time t63, transmission is performed by hot line communication indicated by times t61, t62,... Included in the accumulation time. At least one piece of positional information of the focusing lens 361a is used. As described above, since the driving amount of the focusing lens 361a can be calculated using the position information of the focusing lens 361a at the time included in the accumulation time, the accuracy of the focus adjustment is improved. The body-side control unit 230 determines the drive amount based on the focus detection pixel signal output in the accumulation up to time t63 and the hot line data 90 between times t61 and t63 by the command data communication at time t64 with the focus of operation ID4. It is transmitted as a driving instruction.
Next, when the drive amount is calculated based on the focus detection pixel signal output in the accumulation between times t63 and t64, the drive amount is transmitted by hot line communication indicated by times t61, t62,... Included in the accumulation time. At least one piece of positional information of the focusing lens 361a is used. Further, when the body-side control unit 230 receives the data 91e indicating that the zoom operation ring 375 is being operated by hotline communication during a period from the accumulation to the completion of the calculation (for example, time t65), the data 91e includes The table of the focal length of the imaging optical system 360 to be referred to is changed in consideration of the identifier of the operation direction of the zoom operation ring 375 to be referred to. Therefore, after time t65, body-side control section 230 can calculate the drive amount in accordance with the changed focal length table, and can improve the accuracy of the next focus drive instruction.
According to the present embodiment, as shown at times t63, t64, t67, t68, t70, and t73, the body-side control unit 230 transmits a focus drive instruction with an operation ID for each accumulation. The interchangeable lens 3 starts driving the focusing lens 361a based on the focus drive instruction of the new operation ID, and transmits the operation ID being executed by hot line communication. Although not shown in FIG. 8, the camera body 2 may perform command data communication for each accumulation and acquire information such as the focal length necessary for the focus detection process from the interchangeable lens 3. Further, the operation ID and the operation status may be transmitted to the camera body 2 by both the command data communication and the hot line communication.

When the operation signal of the zoom operation ring 375 is output at time t65, the lens-side control unit 330 changes the identifier of the data 91e and transmits the fact that the zoom operation has been performed to the camera body 2 by hotline communication. Also, at times t65 ′ to t66 during zoom tracking, the lens-side control unit 330 changes the identifier of the data 91d, and transmits to the camera body 2 by hotline communication that zoom tracking is being performed. Also, at times t65 to t66 from the detection of the zoom operation to the end of zoom tracking, the lens-side control unit 330 changes the identifier of the data 91f and indicates that the focus drive instruction cannot be executed. It is transmitted to the camera body 2 by communication.
When calculating the drive amount of the focusing lens 361a based on the focus detection pixel signals accumulated from time t64 to t67, the body-side control unit 230 is in a state in which the data 91d indicating that the zoom tracking is being performed or the focus drive instruction cannot be executed. The driving amount may be calculated without using the position information (data 91a) of the hot line data 90 including the data 91f indicating the presence. That is, the body-side control unit 230 may calculate the drive amount using the highly reliable position information transmitted between times t64 to t65 and t66 to t67. Alternatively, the body-side control unit 230 includes, in the focus drive instruction based on the focus detection pixel signals accumulated from time t64 to t67, information indicating that the focus drive instruction is created from low-reliability position information (FIG. 8 may be output to the interchangeable lens 3. In this case, the interchangeable lens 3 may discard the received focus drive instruction, and may indicate that the operation ID has been completed at time t69 while the operation ID remains at the previous operation ID5. Further, if the hot line data of the position information with low reliability is included between the time t64 and the time t67 when the focus detection pixel signal is stored, the body side control unit 230 determines the timing of the next command data communication. The focus drive instruction may not be output.

  Generally, in the automatic focus adjustment processing, if zoom tracking is performed during accumulation, the position of the focusing lens 361a changes, so that the accuracy of the calculation result of the driving amount may decrease. However, according to the present embodiment, the camera body 2 includes information related to the reliability of the position information in the hot line data 90. For example, the camera body 2 does not use low-reliability position information when calculating the drive amount. Does not output a focus drive instruction based on the focus detection pixel signal accumulated when receiving the hot line data 90 indicating that the focus detection data accumulated when receiving the hot line data 90 indicating a decrease in reliability is received. Appropriate measures can be taken, such as outputting a focus drive instruction with information indicating that the focus drive is created based on the pixel signal.

According to the above-described embodiment, the following operation and effect can be obtained.
The camera body 2 receives the position information of the moving member and the reliability of the moving state or the position information of the moving member by the hot line communication. Can be controlled.
Since the camera body 2 can determine whether or not to transmit an instruction to the interchangeable lens 3 by command data communication based on at least one of the moving state and the reliability, it is easy to determine whether or not the instruction to the interchangeable lens 3 is necessary. At the same time, it is possible to prevent unnecessary instructions from being transmitted, thereby reducing the load of communication processing.
Since the camera body 2 receives the position information of the focusing lens 361a and the reliability of the moving state or the position information of the focusing lens 361a every time by hotline communication, it is possible to easily create an instruction regarding the driving of the focusing lens 361a. it can.
Since the camera body 2 receives the information that the zoom operation has been performed by the hot line communication, the camera body 2 can recognize the zoom operation at a timing earlier than the command data communication, and the focus lens according to the focal length after the zoom operation. The position of 361a can be recognized, and the accuracy of the focus drive instruction can be improved.
Since the camera body 2 can generate an instruction to the interchangeable lens 3 from the hot line data 90 received during the accumulation by using position information having reliability equal to or higher than a predetermined value, the accuracy of the instruction to the interchangeable lens 3 is improved. be able to. Further, the camera body 2 can add the movement state or the reliability included in the hot line data 90 received during the accumulation to the instruction to the interchangeable lens 3 and transmit the instruction. The interchangeable lens 3 can execute an instruction in consideration of a moving state or reliability (or discard the instruction). Therefore, at least one of the camera body 2 and the interchangeable lens 3 can be controlled in consideration of a moving state or reliability, and a difference in processing load between the interchangeable lens 3 and the camera body 2 can be reduced. When the instruction from the camera body 2 includes information indicating that the moving member is moving, the interchangeable lens 3 refers to, for example, a table corresponding to the latest focal length, and moves the focusing lens 361a. Can also be corrected.

  Since the interchangeable lens 3 periodically transmits information on the position of the moving member and information used for moving control of the moving member to the camera body 2 through an independent communication system, the accuracy of the movement control performed by the camera body 2 is improved. Can be improved.

  The interchangeable lens 3 transmits the reliability of the position information together with the position information to the camera body 2 as information used for movement control, so that the camera body 2 can easily consider the reliability of the position information. In addition, since the interchangeable lens 3 is represented by an identifier indicating whether the position information is valid or invalid as the reliability of the position information, the interchangeable lens 3 can easily select the identifier, and the camera body 2 can select the identifier. The reliability of the position information can be easily recognized. In addition, the interchangeable lens 3 can easily transmit the interchangeable lens 3 to the camera body 2 by hotline communication, indicating that the optical performance of the imaging optical system 360 may be reduced. The camera body 2 considers the information used for the movement control of the moving member together with the position information, does not use the low-reliability position information, and indicates that the drive instruction signal is generated from the low-reliability position information. It is possible to take measures such as.

  The interchangeable lens 3 can include a plurality of types of information other than the position information in the hot line data 90, and the number and types of information that can be notified to the camera body 2 by hot line communication can be appropriately selected. Since the camera body 2 can receive a plurality of pieces of information in one hotline communication, it is not necessary to consider the timing of acquiring each piece of information as compared with a case where a plurality of pieces of information are received in a plurality of communications, and the camera body 2 can be easily moved. Control is possible.

  Since the interchangeable lens 3 outputs the HCLK signal of the hot line communication together with the HDATA signal, the interchangeable lens 3 can take the initiative in performing the hot line communication. Further, since the camera body 2 outputs the CLK signal of the command data communication together with the DATAB signal, it is possible to take the initiative in the command data communication. Therefore, each of the camera body 2 and the interchangeable lens 3 can take the initiative of two independent communication systems.

  The present invention is not limited to the contents described above. Other embodiments that can be considered within the scope of the technical concept of the present invention are also included in the scope of the present invention.

(Modification 1)
In the above description, an example in which the DMA function is used in the hot line communication has been described. Instead of using the DMA function, the hot line data 90 may be generated via a CPU. In the first modification, the transmission of the HDATA signal is performed by the lens-side second communication unit 340b, and the generation of the hot line data 90 is performed by the lens-side control unit 330. With this configuration, the hot line communication and the generation of the hot line data 90 can be performed in parallel without using the DMA function. However, the generation of the hot line data 90 is performed during a period that does not exceed one cycle of the hot line communication.

(Modification 2)
In the above example of the hot line communication, the data transfer direction of the clock synchronous communication using only the HCLK signal line and the HDATA signal line is set to one direction from the interchangeable lens 3 to the camera body 2. However, another signal line may be added to enable bidirectional data transfer. Alternatively, the input / output of the HDATA signal line may be configured to be switchable, so that bidirectional data communication may be performed.

  The hot line communication is not limited to the clock synchronous type, but may use UART (start-stop synchronous type communication). Further, a handshake signal line or a CS (chip select) signal line is added in addition to the clock signal line and the data signal line, so that the lens-side control unit 330 and the body-side control unit 230 match the communication start timing. It may be configured as follows.

(Modification 3)
The data 91d has been described as including the identifier indicating whether or not the zoom tracking is being performed or the identifier indicating that the movement is being performed with speed priority in the above-described embodiment, but is not limited thereto. As another example when the focusing lens 361a is not at the designed position, the focusing lens 361a is driven for a reason other than the focus adjustment during initialization of the lens driving unit 370a, during an error occurring in the interchangeable lens 3, during focusing processing. While you are there.

(Modification 4)
Although the data 91b has been described in the above embodiment as including a plurality of focusing lenses 363 and 364 and including an identifier indicating that there is no reliability during zoom tracking, the present invention is not limited to this. The data 91b may include a numerical value according to the reliability of the data 91a, or may include an identifier indicating whether the position information of one focusing lens is valid or invalid. Further, the lens-side control unit 330 is not limited to the number of focusing lenses, and when the information corresponding to the photographing distance (in the present embodiment, indicated by numerical values of 0 to 255) cannot be determined, the data 91d indicates “invalid. May be included.

(Modification 5)
When the predetermined number of data 91b includes an identifier indicating “invalid”, the camera body 2 may reduce the calculation processing without calculating the defocus amount or the drive amount.

DESCRIPTION OF SYMBOLS 1 ... Camera system, 2 ... Camera body, 3 ... Interchangeable lens, 90 ... Hotline data, 91 ... Data, 230 ... Body side control part, 235 ... Storage part, 240 ... Body side communication part, 270 ... Signal processing part, 330: lens-side control unit, 340: lens-side communication unit, 350: lens-side storage unit, 360: imaging optical system, 370: lens drive unit, 375: zoom operation ring

Claims (9)

An interchangeable lens having an optical system is a detachable camera body,
A second communication unit that performs second communication that periodically receives data from the interchangeable lens,
Using the data received by at least the second communication unit, a creating unit that creates an instruction to the interchangeable lens,
A first communication unit that performs first communication with the interchangeable lens, and transmits the instruction to the interchangeable lens,
The camera body, wherein the data includes position information indicating a position of a moving member in the interchangeable lens, and at least one of a moving state of the moving member and reliability of the position information.   The camera body according to claim 1, further comprising: a determination unit configured to determine whether the first communication unit can transmit the instruction based on at least one of the moving state and the reliability. An imaging unit that captures a subject image formed by the optical system on an imaging surface,
3. The camera body according to claim 1, wherein the creating unit creates the instruction based on information on a shift between the imaging surface and an image forming position of the optical system. The moving state indicates whether or not the moving member has moved,
4. The method according to claim 1, wherein the creating unit creates the instruction based on a focal length of the optical system changed by the movement of the moving member when the moving state indicates that the moving member moves. 5. A camera body according to any one of the preceding claims.   The creating unit creates the instruction using the position information included in the data including the reliability equal to or more than a predetermined value, and does not use the position information included in the data including the reliability less than a predetermined value. The camera body according to any one of claims 1 to 4, wherein the instruction is created.   The camera body according to claim 1, wherein the creating unit creates the instruction so as to include information based on the movement state or the reliability. An interchangeable lens having an optical system that is detachable from the camera body,
A movable member movable within the interchangeable lens,
A first communication unit that performs first communication with the camera body and receives an instruction related to movement of the moving member from the camera body.
A second communication unit that performs a second communication that periodically transmits data to the camera body,
With
The data includes position information indicating the position of the moving member, and at least one of the moving state of the moving member or the reliability of the position information,
The interchangeable lens, wherein the instruction includes information on at least one of the movement state and the reliability at the time the instruction is created.   The interchangeable lens according to claim 7, further comprising: a determination unit configured to determine whether to execute the instruction based on at least one of the moving state and the reliability at the time the instruction is created.   9. The interchangeable lens according to claim 7, further comprising a determining unit that determines a moving amount of the moving member based on the instruction.

Images