JP2013125159A - Lens device and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress driving noise without transmitting a large amount of information on the driving speed of an actuator between a lens device and an imaging apparatus.SOLUTION: A lens device 2 is detachably attached to an imaging apparatus 1 and can communicate with the imaging apparatus. The lens device includes: an actuator 28 which moves an optical member 22 and whose driving speed is variable; a lens control part 26 for controlling the driving of the actuator; and a driving noise memory 36 for storing driving noise information on driving noise generated when the actuator is driven and varying in response to the change in the driving speed of the actuator. The lens control part receives information on an allowable value of the driving noise from the imaging apparatus, calculates an upper limit value of the driving speed of the actuator by using the allowable value and the driving noise information, and transmitting the upper limit value of the driving speed to the imaging apparatus to cause the imaging apparatus to determine the driving speed of the actuator equal to or lower than the upper limit value of the driving speed.

Description

  The present invention relates to an interchangeable lens type imaging apparatus and a lens apparatus that is detachably attached to the imaging apparatus.

  In an imaging apparatus such as a video camera, an optical member such as a lens or a diaphragm is driven by an actuator such as a stepping motor or a vibration motor. At this time, it is desirable to control the actuator at a speed at which the drive sound becomes as small as possible.

  Patent Document 1 discloses the following interchangeable lens camera system. In the interchangeable lens, drive speed information including silent speed information indicating a drive speed at which the actuator can be driven quietly is stored in a memory in advance. When the interchangeable lens is attached to the imaging device (camera body), drive speed information is transmitted from the interchangeable lens to the camera body, and the camera body stores the received drive speed information in the flash memory. The camera body generates a control signal for controlling the diaphragm drive unit (actuator) of the interchangeable lens based on the silent speed information stored in the flash memory when the diaphragm is driven. The control signal includes an aperture value and a driving speed corresponding to the set value included in the silent speed information. The interchangeable lens operates the aperture driving unit at the driving speed included in the control signal, and changes the aperture to the aperture value included in the control signal. In this way, control of the aperture drive unit that reduces drive sound from the camera body is performed.

JP 2009-288778 A

  However, the camera system disclosed in Patent Document 1 has the following problems. First, it is necessary to mount a large-capacity flash memory in the camera body for storing large-capacity driving speed information including silent speed information transmitted from the interchangeable lens. Second, as part of the initial operation when the interchangeable lens is attached to the camera body, communication of drive speed information from the interchangeable lens to the camera body and the flash memory of the drive speed information in the camera body Is stored. For this reason, it takes a long time until all of the initial operations including them are completed and photographing is possible.

  According to the present invention, the actuator can be driven so that the driving sound generated from the lens device is reduced without communicating large capacity information regarding the driving speed of the actuator between the lens device and the imaging device. A lens device and an imaging device are provided.

  A lens device according to an aspect of the present invention is detachably attached to an imaging device and can communicate with the imaging device. The lens device moves or operates an optical member, an actuator whose driving speed is variable, a lens control unit that controls driving of the actuator, and a lens control unit that is generated according to the driving of the actuator, and changes according to the driving speed. A drive sound memory that stores drive sound information that is information related to the drive sound. The lens control unit receives an allowable value of the driving sound from the imaging device, obtains an upper limit value of the driving speed of the actuator using the allowable value and the driving sound information, and transmits the upper limit value of the driving speed to the imaging device. The image pickup apparatus is caused to determine a drive speed of an actuator that is equal to or lower than a drive speed upper limit value, and the actuator is driven at the determined drive speed received from the image pickup apparatus.

  In addition, in an imaging device according to another aspect of the present invention, a lens device is detachably mounted, and communication with the lens device is possible. The lens device includes an actuator that moves or operates an optical member and has a variable driving speed, a lens control unit that controls driving of the actuator, and a drive that is generated according to the driving of the actuator and changes according to the driving speed. And a drive sound memory that stores drive sound information that is information related to sound. The imaging apparatus has an imaging apparatus control unit that determines the drive speed of the actuator. The imaging device control unit transmits an allowable value of the driving sound to the lens control unit, and obtains an upper limit value of the driving speed of the actuator using the allowable value and the driving sound information to the lens control unit. Further, the driving speed upper limit value is received from the lens control unit, and the driving speed of the actuator that is equal to or lower than the driving speed upper limit value is determined. The determined driving speed is transmitted to the lens control unit, and the actuator is driven at the determined driving speed.

  According to the present invention, the drive sound allowable value is transmitted from the imaging device to the lens device, and the drive speed upper limit value is merely transmitted from the lens device to the imaging device. For this reason, it is possible to drive the actuator so that the driving sound generated from the lens device is reduced without transmitting large-capacity information between the lens device and the imaging device. Therefore, it is possible to eliminate the need to mount a memory for storing information related to the allowable value of the drive sound transmitted from the lens device in the imaging device, or the initial state when the lens device is mounted on the imaging device. The time required for the operation can be shortened.

1 is a block diagram showing a configuration of a camera system that is Embodiment 1 of the present invention. FIG. 3 is a diagram illustrating a relationship between driving speed and driving sound in the camera system according to the first embodiment. 6 is a flowchart illustrating an operation in the camera system according to the first exemplary embodiment. FIG. 3 is a diagram illustrating a relationship between a power supply voltage and a driving speed in the camera system according to the first embodiment. FIG. 3 is a diagram illustrating a relationship between temperature and driving speed in the camera system of Embodiment 1. FIG. 4 is a diagram illustrating a relationship between posture and driving speed in the camera system of Embodiment 1. FIG. 6 is a diagram illustrating a relationship between history information and driving speed in the camera system according to the first embodiment. The figure which shows the relationship between the drive speed and drive sound in the camera system which is Example 2 of this invention. The figure which shows the relationship between the drive speed and drive sound in the camera system which is Example 3 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a configuration of a camera system including a camera body (imaging device) and an interchangeable lens (lens device) that is Embodiment 1 of the present invention. Reference numeral 1 denotes a camera body, and 2 denotes an interchangeable lens.

  An electric circuit unit 3 including the following components is provided in the camera body 1. Reference numeral 4 denotes an image sensor such as a CCD sensor or a CMOS sensor, which photoelectrically converts a subject image formed by light from the photographing optical system in the interchangeable lens 2 and outputs an electrical signal. An image processing unit 8 performs various processes on the electric signal from the image sensor 4 to generate an image signal that forms a moving image or a still image (hereinafter also referred to as an image).

  Reference numeral 5 denotes a photometric unit which detects subject brightness from the image signal. A focus detection unit 6 detects the focus state of the photographing optical system using the contrast information obtained from the image signal. Reference numeral 7 denotes a shutter control unit that controls the exposure time of the image sensor 4. Reference numeral 9 denotes a camera CPU as an imaging device control unit that controls the operations of the camera body 1 and the interchangeable lens 2.

  Reference numeral 10 denotes a lens mounting detection unit that detects that the interchangeable lens 2 is mounted, and includes, for example, a switch or a photodetector. Reference numeral 11 denotes a camera communication unit that communicates with the camera CPU 9 and the lens CPU 26 as a lens control unit provided in the interchangeable lens 2 together with the lens communication unit 25 provided in the interchangeable lens 2.

  Reference numeral 12 denotes a control system power supply that supplies power to control system circuits such as the image sensor 4, the photometry unit 5, the focus detection unit 6, and the image processing unit 8. A drive system power supply 13 supplies power to the drive system circuits such as the shutter control unit 7 and the interchangeable lens 2. Reference numeral 14 denotes an imaging switch (SW1) for starting an imaging operation. Reference numeral 15 denotes a recording unit composed of a nonvolatile memory or the like, which records the image generated by the image processing unit 8.

  Reference numeral 16 denotes a microphone. Reference numeral 17 denotes an audio processing unit which reduces external noise included in the audio signal by changing the amplitude and frequency characteristics of the audio signal from the microphone 16, and driving sound generated from the interchangeable lens 2 (for this, (To be described later).

  In the interchangeable lens 2, a photographic optical system and an electric circuit unit 20 are provided. The photographic optical system moves in the optical axis direction and performs zooming, zoom lens 21 that moves in the optical axis direction and focus lens 22 that moves in the optical axis direction, and moves in a direction perpendicular to the optical axis to correct image blur. A correction lens 23, a diaphragm 24 for adjusting the amount of light, and an ND filter 37 for attenuating the amount of light are included.

  The electric circuit unit 20 includes the following components in addition to the lens communication unit 25 described above and the lens CPU 26 that controls the operation of the interchangeable lens 2 together with the camera CPU 9. A zoom lens drive control unit 27 includes a zoom actuator that moves the zoom lens 21, and a focus lens drive control unit 28 includes a focus actuator that moves the focus lens 22. A correction lens drive control unit 29 includes a correction actuator that moves the correction lens 23. Reference numeral 30 denotes an aperture ND filter drive control unit including an aperture actuator and an ND actuator for opening and closing the aperture 24 (moving aperture blades not shown) and moving the ND filter 37 forward and backward with respect to the optical path.

  Each actuator used in the present embodiment is constituted by a stepping motor, a vibration type motor, or the like, and its drive speed is variable.

  Reference numeral 31 denotes a drive system power supply voltage detection unit that detects a power supply voltage supplied to the zoom lens drive control unit 27, the focus lens drive control unit 28, the correction lens drive control unit 29, and the aperture ND filter drive control unit 30. Reference numeral 32 denotes a temperature detection unit that detects the temperature in the interchangeable lens 2. Reference numeral 33 denotes an attitude detection unit that detects the attitude of the interchangeable lens 2 and includes an acceleration sensor and the like.

  Inside the lens CPU 26, a history memory 34 is configured by a non-volatile memory or the like, and stores a driving history such as a cumulative driving number and a cumulative driving time after the interchangeable lens 2 is manufactured.

  The power supply voltage, posture, temperature, and drive history correspond to actuator drive conditions (hereinafter referred to as actuator drive conditions). The drive system power supply voltage detection unit 31, the temperature detection unit 32, the attitude detection unit 33, and the history memory 34 correspond to an actuator drive condition acquisition unit.

  In the lens CPU 26, reference numeral 35 denotes a drive characteristic memory that stores information (drive characteristic information) related to the drive characteristics of each actuator corresponding to the power supply voltage, temperature, posture, and drive history. The drive characteristics of each actuator here indicate the actual drive speed of the actuator when the lens CPU 26 controls the drive of each actuator at the same drive speed with respect to each drive control unit. Reference numeral 36 denotes a drive sound memory that stores drive sound information that is information related to drive sound that is generated in accordance with the drive of each actuator and changes according to the drive speed.

  When the corresponding optical member (lenses 21 to 23, diaphragm 24 or ND filter 37) is moved or operated by the actuator of each drive control unit, driving sound is generated from the actuator or a mechanism that transmits the driving force to the optical member. . The drive sound leaks out of the interchangeable lens 2 or is mechanically transmitted to the camera body 1. Since the driving sound generated from the interchangeable lens 2 is recorded through the microphone 16 by the camera body 1 during imaging, it is necessary to reduce the driving sound as much as possible.

  FIG. 2 shows driving sound information stored in the driving sound memory 36. Specifically, the drive sound information is information indicating the relationship between the drive speed (horizontal axis) of each actuator and the magnitude of the generated drive sound (vertical axis).

  As can be seen from FIG. 2, as the driving speed of the actuator increases, the generated driving sound also increases. When the drive sound is limited to N1 or less (when N1 is set to the drive sound upper limit value), the drive speed may be set to v3 or less. Further, when the drive sound is limited to N2 (> N1) or less (when N2 is set to the drive sound upper limit value), the drive speed may be set to v4 or less. The driving sound information changes depending on conditions such as the position of the optical member driven by the actuator, the driving state of each actuator, vibration between the interchangeable lens 2 and the camera body 1, and sound transmission characteristics. For this reason, drive sound information corresponding to these conditions is stored in the drive sound memory 36 in advance.

  Next, the operation of the camera body 1 and the interchangeable lens 2 will be described using the flowchart of FIG. The flowchart on the left side in FIG. 3 shows the operation of the camera body 1, and the flowchart on the right side shows the operation of the interchangeable lens 2. These operations are executed by the camera CPU 9 and the lens CPU 26 according to computer programs stored therein.

  First, when the operation of the camera CPU 9 starts in step (Step) 1, a signal indicating that the interchangeable lens 2 is mounted is input from the interchangeable lens mounting detection unit 10 in step 2 (the interchangeable lens 2 is mounted). Or not). When the interchangeable lens 2 is attached, the camera CPU 9 supplies power to the interchangeable lens 2 via the control system power supply 12 and the drive system power supply 13.

  Next, in step 3, the camera CPU 9 determines whether or not the imaging switch (SW1) 14 is turned on. If it is turned on, the process proceeds to step 4. In step 4, the camera CPU 9 transmits, to the lens CPU 26, information on the model and focal length of the interchangeable lens 2 and information on the positions of the lenses 21 to 23, the aperture 24 and the ND filter 37 to the camera CPU 9 as initial communication. Send instructions to Further, the initial communication includes a drive command for each actuator from the camera CPU 9.

  The lens CPU 26 receives these instructions at step 22 and transmits corresponding information to the camera CPU 9. In step 23, the lens CPU 26 drives the zoom lens 21 via the zoom lens drive control unit 27 if the command from the camera CPU 9 is a drive command for the zoom lens 21. If the driving command is for the focus lens 22, the focus lens 22 is driven via the focus lens drive control unit 28. Further, if it is a correction lens drive command, the correction lens 23 is driven via the correction lens drive control unit 29. If the driving command is for the diaphragm 24 or the ND filter 37, the diaphragm 24 or the ND filter 37 is driven via the diaphragm ND filter drive control unit 30.

  As described above, the drive sound generated from the interchangeable lens 2 as each actuator is driven is recorded by the camera body 1 through the microphone 16. The permissible value of the drive sound includes the magnitude of the environmental sound, the directivity of the microphone 16, the vibration and sound transmission characteristics between the interchangeable lens 2 and the camera body 1, the frequency of the drive sound, and the noise removal effect in the sound processing unit 17. It changes with the allowable driving sound change factors such as.

  Therefore, in step 5, the camera CPU 9 calculates a drive sound upper limit value that is an allowable value of the drive sound according to the above-described allowable drive sound change factor and a drive time t1 that is a time length during which each actuator can be driven. Then, the data is transmitted to the lens CPU 26. Note that the driving time t1 may be a time interval for acquiring an image by imaging, a short driving time so that the change of the image during imaging is small, or a long driving time so that the driving sound can be reduced. Or you may.

  In step 24, the lens CPU 26 receives the drive sound upper limit value and the drive time t1 transmitted from the camera CPU 9. In step 25, the lens CPU 26 determines the power supply voltage, posture, temperature, and drive history as actuator drive conditions from the drive system power supply voltage detector 31, the temperature detector 32, the posture detector 33, and the history memory 34, respectively. To get.

  Next, in step 26, the lens CPU 26 compares the power supply voltage, posture, temperature, and drive history acquired in step 25 with the drive characteristic information stored in the drive characteristic memory 35. From this comparison result, the drive speed, which is the drive amount that can drive the actuator per unit time, with respect to the acquired power supply voltage, attitude, temperature, and drive history is determined as the first drive speed (hereinafter referred to as drive speed 1). Calculation).

  The actuator driving condition used for obtaining the driving speed 1 may be at least one of the power supply voltage, the attitude, the temperature, and the driving history.

  Subsequently, in step 27, the lens CPU 26 uses the driving sound information stored in the driving sound memory 36 to obtain a second driving speed corresponding to the driving sound upper limit value acquired in step 24 (hereinafter referred to as driving speed 2). Is calculated. The driving speed 2 is, for example, driving speeds v3 and V4 corresponding to the driving sound upper limit values N1 and N2 shown in FIG. In this step, the lens CPU 26 compares the driving speed 1 with the driving speed 2 and sets the lower driving speed to a driving speed upper limit value (driving speed 3) that is an upper limit value (allowable value) of the driving speed. ) Is determined (selected).

  Hereinafter, a method for determining the drive speed upper limit value (drive speed 3) for each power supply voltage, attitude, temperature, and drive history will be described.

  FIG. 4 shows the relationship between the power supply voltage supplied to each drive control unit and the drive speed of the actuator. The horizontal axis indicates time, 0 is the drive start time, and t1 is the drive end time. The vertical axis represents the drive amount (position) of the actuator. The drive amount up to time t1 determined from the drive sound upper limit value is x0, and the drive speed 2 is x0 / t1. As described above, the drive speed 1 is calculated by the lens CPU 26 from the output from the drive system power supply voltage detection unit 31 and the drive characteristic information stored in the drive characteristic memory 35. When the power supply voltage is high, the driving speed 1 is x1 / t1 (> x0 / t1), and when the power supply voltage is low, the driving speed 1 is x2 / t1 (<x0 / t1).

  The lower drive speed 3 (drive speed upper limit) of the drive speed 1 and the drive speed 2 is x0 / t1 when the power supply voltage is high, and x2 / t1 when the power supply voltage is low. Each driving speed here corresponds to a driving speed at a constant speed when the actuator is accelerated and then driven at a constant speed and then decelerated toward a stop position. The same applies to the driving speed described below with reference to FIGS.

  FIG. 5 shows the relationship between the temperature and the driving speed of the actuator. The meanings of the horizontal axis, 0, t1, and the vertical axis, and the driving speed 2 (= x0 / t1) are the same as in FIG. The driving speed 1 is calculated by the lens CPU 26 from the output from the temperature detection unit 32 and the driving characteristic information stored in the driving characteristic memory 35 as described above. When the temperature is high, the driving speed 1 is x3 / t1 (> x0 / t1), and when the temperature is low, the driving speed 1 is x4 / t1 (<x0 / t1).

  The lower drive speed 3 (drive speed upper limit value) of the drive speed 1 and the drive speed 2 is x0 / t1 when the temperature is high, and x4 / t1 when the temperature is low. .

  FIG. 6 shows the relationship between the posture and the driving speed of the actuator. The meanings of the horizontal axis, 0, t1, and the vertical axis, and the driving speed 2 (= x0 / t1) are the same as in FIG. As described above, the driving speed 1 is calculated by the lens CPU 26 from the output from the attitude detection unit 33 and the driving characteristic information stored in the driving characteristic memory 35. The driving speed 1 is x5 / t1 (> x0 / t1) when the optical axis direction of the photographing optical system is a horizontal posture, and the driving speed when the posture is a vertical posture where the optical axis direction is upward. 1 becomes x6 / t1 (<x0 / t1).

  The lower drive speed 3 (drive speed upper limit value) of the drive speed 1 and the drive speed 2 is x0 / t1 in the normal posture and x6 / t1 in the vertical posture. .

  FIG. 7 shows the relationship between the drive history and the drive speed of the actuator. The meanings of the horizontal axis, 0, t1, and the vertical axis, and the driving speed 2 (= x0 / t1) are the same as in FIG. As described above, the driving speed 1 is calculated by the lens CPU 26 from the driving history read from the history memory 34 (here, the cumulative driving time of the actuator) and the driving characteristic information stored in the driving characteristic memory 35. The When the cumulative drive time is short, the drive speed 1 is x7 / t1 (> x0 / t1), and when the cumulative drive time is long, the drive speed 1 is x8 / t1 (<x0 / t1).

  The lower drive speed 3 (drive speed upper limit) of the drive speed 1 and the drive speed 2 is x0 / t1 when the cumulative drive time is short, and x8 when the cumulative drive time is long. / T1.

  The drive speed upper limit value determined in this manner is transmitted from the lens CPU 26 to the camera CPU 9 in step 28. In step 6, the camera CPU 9 receives the driving speed upper limit value from the lens CPU 26 and stores it.

  Next, in step 7, the camera CPU 9 starts imaging (recording of images and sounds). Then, the process proceeds to step 8, and the focus detection unit 6 is caused to generate contrast information from the image signal.

  Next, in step 9, the camera CPU 9 determines the drive direction of the focus lens 22 and the drive speed below the upper limit of the drive speed received in step 6 according to the contrast information generated in step 8. Then, a focus lens driving command including information on the driving direction and the driving speed is transmitted to the lens CPU 26.

  In step 29, the lens CPU 26 receives a focus lens drive command from the camera CPU 9. In step 30, the lens CPU 26 drives the focus lens 22 through the focus lens drive control unit 28 in the drive direction designated by the focus drive command at the designated drive speed.

  In step 10, the camera CPU 9 determines whether or not the driving sound from the interchangeable lens 2 detected by the sound processing unit 17 through the microphone 16 is equal to or less than a predetermined allowable value. If the drive sound exceeds the allowable value, the process returns to step 5 and the drive speed upper limit value is reset. If the driving sound is below the allowable value, the process proceeds to step 11.

  In step 11, the camera CPU 9 determines whether or not the contrast information indicates an in-focus state. If the in-focus state does not indicate, the camera CPU 9 returns to the processing from step 8 and continues to issue a focus lens drive command to the lens CPU 26. Send to. If the in-focus state is indicated, the process proceeds to step 12. When Steps 8 to 10 are repeated, the focus lens 22 is continuously driven (for example, wobbling that reciprocates in the near and infinity directions is performed), and the driving sound at that time is easily recorded. For this reason, driving sound generated during imaging can be reduced by driving the focus actuator at a driving speed equal to or lower than the upper limit of the driving speed.

  In step 12, the camera CPU 9 checks conditions for continuing imaging such as whether or not the imaging switch 14 is turned off and whether or not the storage capacity and power source of the recording unit 15 have sufficient capacity. Return to 2 and continue imaging. When the imaging is finished, the process proceeds to step 13 and an actuator drive stop command is transmitted to the lens CPU 26.

  When the lens CPU 26 receives the actuator drive stop command in step 31, the lens CPU 26 stops the drive of each actuator.

  In the flowchart of FIG. 3, the case where the driving sound generated when driving the focus actuator is reduced has been described as an example. However, the zoom, correction, aperture, and ND actuator are similarly driven at a driving speed lower than the upper limit of the driving speed. You may make it drive by.

  As described above, according to the present embodiment, each actuator is controlled so that the driving sound generated from the interchangeable lens 2 is reduced without transmitting large information between the interchangeable lens 2 and the camera body 1. Can be driven.

  In this embodiment, the driving speed 1 calculated according to the actuator driving conditions (power supply voltage, temperature, posture and driving history) is compared with the driving speed 2 corresponding to the driving sound upper limit value, and the lower one is compared. The case where the drive speed is determined as the drive speed upper limit value (drive speed 3) has been described. However, it is not always necessary to compare the driving speed 1 and the driving speed 2, and the driving speed 2 corresponding to the driving sound upper limit value is determined as the driving speed upper limit value (driving speed 3) without considering the actuator driving conditions. May be.

  Next, a camera system that is Embodiment 2 of the present invention will be described. The configuration and operation of the camera system (interchangeable lens and camera body) of this embodiment are the same as those of the first embodiment. FIG. 8 shows information related to the driving sound stored in the driving sound memory 36 in the present embodiment. Similar to the first embodiment, the information regarding the driving sound is information indicating the relationship between the driving speed (horizontal axis) of each actuator and the magnitude (vertical axis) of the driving sound generated from the interchangeable lens 2.

  In this embodiment, the driving sound decreases as the driving speed of the actuator increases from v5 to a value between v6 and v7, and the driving sound increases as the driving speed becomes larger than the value between v6 and v7. To do. When the drive sound is limited to N3 or less (when N3 is set to the drive sound upper limit value), the drive speed may be set between v6 and v7. When the drive sound is limited to N4 (> N3) or less (when N4 is set to the drive sound upper limit value), the drive speed may be set to v8 or less.

  Next, a camera system that is Embodiment 2 of the present invention will be described. The configuration and operation of the camera system (interchangeable lens and camera body) of this embodiment are the same as those of the first embodiment. FIG. 9 shows information relating to the drive sound stored in the drive sound memory 36 in the present embodiment. Similar to the first embodiment, the information regarding the driving sound is information indicating the relationship between the driving speed (horizontal axis) of each actuator and the magnitude (vertical axis) of the driving sound generated from the interchangeable lens 2.

  In this embodiment, the driving sound increases as the driving speed of the actuator increases from v9 to a value between v10 and v11, and the driving sound decreases as the driving speed becomes larger than the value between v10 and v11. To do. When the drive sound is limited to N5 or less (when N5 is set to the drive sound upper limit value), the drive speed may be set to v12 or more. Further, when the drive sound is limited to N6 (> N5) or less (when N4 is set to the drive sound upper limit value), the drive speed may be set to v10 or less or v11 or more.

  Each embodiment described above is only a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

It is possible to provide an interchangeable lens imaging system with a small driving sound of the lens and the diaphragm.

1 Camera body 2 Interchangeable lens 9 Camera CPU
22 Focus lens 26 Lens CPU
28 Focus lens drive controller 36 Drive sound memory

Claims (6)

A lens device that is detachably attached to an imaging device and capable of communicating with the imaging device,
An actuator that moves or operates an optical member and has a variable driving speed;
A lens control unit for controlling the driving of the actuator;
A drive sound memory that stores drive sound information that is information related to the drive sound that is generated when the actuator is driven and changes according to the drive speed;
The lens control unit
Receiving an allowable value of the driving sound from the imaging device;
An upper limit value of the driving speed of the actuator is obtained using the allowable value and the driving sound information,
Transmitting the driving speed upper limit value to the imaging device, causing the imaging device to determine a driving speed of the actuator that is equal to or lower than the driving speed upper limit value;
A lens apparatus, wherein the actuator is driven at the determined driving speed received from the imaging apparatus. An actuator driving condition acquisition unit for acquiring the driving condition of the actuator;
A drive characteristic memory that stores drive characteristic information that is information related to the drive characteristic of the actuator according to the drive condition;
The lens control unit
Using the drive characteristic information, obtain the first drive speed of the actuator according to the drive condition acquired by the actuator drive condition acquisition unit,
A second driving speed of the actuator is obtained using the allowable value and the driving sound information,
The lens apparatus according to claim 1, wherein the lower one of the first driving speed and the second driving speed is selected as the driving speed upper limit value.   The lens according to claim 2, wherein the driving condition includes at least one of a power supply voltage supplied to the actuator, an attitude of the lens device, a temperature of the lens device, and a driving history of the actuator. apparatus. An imaging apparatus in which a lens apparatus is detachably mounted and can communicate with the lens apparatus,
The lens device is
An actuator that moves or operates an optical member and has a variable driving speed;
A lens control unit for controlling the driving of the actuator;
A drive sound memory that stores drive sound information that is information related to the drive sound that is generated when the actuator is driven and changes according to the drive speed;
The imaging apparatus has an imaging apparatus control unit that determines the driving speed of the actuator,
The imaging device control unit
Sending the drive sound tolerance to the lens controller, causing the lens controller to determine the upper limit of the actuator drive speed using the tolerance and the drive sound information,
Receiving the driving speed upper limit value from the lens control unit, determining the driving speed of the actuator below the driving speed upper limit value;
An imaging apparatus, wherein the determined driving speed is transmitted to the lens control unit, and the actuator is driven at the determined driving speed. The lens device is
An actuator driving condition acquisition unit for acquiring the driving condition of the actuator;
A drive characteristic memory that stores drive characteristic information that is information related to the drive characteristic of the actuator according to the drive condition;
The lens control unit
Using the drive characteristic information, obtain the first drive speed of the actuator according to the drive condition acquired by the actuator drive condition acquisition unit,
The imaging device control unit
Information about the allowable value of the driving sound is transmitted to the lens control unit, and the lens control unit is caused to obtain the second driving speed of the actuator using the allowable value and the driving sound information. The imaging apparatus according to claim 4, wherein a lower one of the first driving speed and the second driving speed is selected as the driving speed upper limit value.   The imaging according to claim 5, wherein the driving condition includes at least one of a power supply voltage supplied to the actuator, an attitude of the lens device, a temperature of the lens device, and a driving history of the actuator. apparatus.

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