JPH0611641A - Lens control device for camera dealing with interchangeable lens - Google Patents

Abstract

PURPOSE:To speedily carry out focusing after mounting of a lens unit by moving the zoom lens to a normal range before the start of an automatic focusing operation when the zoom lens is loaded while it is in a wide macro range. CONSTITUTION:When the lens unit 2 is mounted to a camera unit 3, specified initial information is obtained by a micro computer 25 on the camera unit 3 side from a microcomputer 16 on the lens unit 2 side through a signal transmission line 5. After that, the zoom encoder information obtained by the microcomputer 25 on the camera unit 3 side through the signal transmission line 5, that is when the information of position of the zoom lens 7 is indicated to be the wide macro range, a driving command signal is imparted to a zoom driving circuit 14 of the lens unit 2 at the microcomputer 25 before the automatic focus mode operation is started until the wide macro range is not indicated by the zoom encoder information through the signal transmission line 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens control device for an interchangeable lens type camera adapted to, for example, a video camera.

[0002]

2. Description of the Related Art In recent years, the spread of video equipment such as video cameras has been remarkable, and with the spread thereof, high image quality and multi-functionality have been realized.
The size and weight are reduced and the operability is improved.

In recent years, also in video cameras, as part of the improvement of multifunctionality, operability, and performance, an interchangeable lens system in which a lens unit is detachably attached to a camera unit has been developed.

Further, many lens units having a so-called wide-range autofocus function, in which the range in which the focus can be adjusted, that is, the focus range is expanded, have been proposed. For example, the first focus lens (front lens) is used for focusing and the second and third zoom lenses are used for zooming.

In such a lens unit, if the distance of the subject is close and the focus lens becomes a close distance beyond the range (normal area) in which the focus can be adjusted by the first group of focus lenses, the focus cannot be adjusted by the focus lens. , By performing relative movement of the second and third lens groups for zooming, it is possible to perform close-up photography, that is, macro photography.

[0006]

However, according to the conventional video camera, when the lens unit is mounted on the camera unit with the zoom lens or the focus lens thereof being positioned in the wide macro area or the tele macro area, the lens unit is not mounted. In some cases, focusing was not performed properly after mounting. For example, there are problems that the operation of the zoom lens or the focus lens stops at a position where the subject is out of focus, or the operation of the zoom lens or the focus lens is slow until the focus is achieved.

The cause of the problems relating to the zoom lens is that the subject to be focused immediately after the lens unit is mounted is generally in the normal area in many cases. Therefore, when the zoom lens is in the wide macro area, the zoom lens is in the wide macro area. By searching the area and determining that there is no subject in the wide macro area, the zoom lens is stopped at a predetermined position in the normal area, and the auto focus operation is performed by the focus lens, so the wide macro area search time is added to the focus time. This is because it becomes a shape.

Further, the cause of the problems relating to the focus lens is that the subject to be focused immediately after the lens unit is mounted is usually in the normal area in many cases, and in the near area, the focus is in the normal area. Compared with this, since the amount of movement of the focus lens required to change the same subject distance is large, it is easy to lose sight of the subject in the normal region when the focus lens is in the close range, and it may take time to get out of the subject or focus may be lost. This is because a phenomenon that the operation of the focus lens is erroneously stopped before it occurs.

The present invention has been made in view of the above circumstances. A first object of the present invention is to mount a lens unit on a camera unit with its zoom lens in a wide macro area. It is an object of the present invention to provide a lens control device for an interchangeable lens type camera, which enables quick focusing after mounting a lens unit.

A second object of the present invention is to quickly focus after mounting the lens unit when the lens unit is mounted on the camera unit while the focus lens of the lens unit remains in the telemacro region. An object of the present invention is to provide a lens control device for an interchangeable lens type camera which is designed to be performed.

[0011]

[Means for Solving the Problems] The above first object is achieved.
Therefore, according to the first aspect of the present invention, the zoom lens is driven to change.
Zoom lens driving means for performing a double operation and the zoom lens
Zoom lens position detecting means for detecting the moving position of the lens
The lens unit equipped with is detachable from the camera unit
Control device for interchangeable lens compatible camera
And the lens unit is attached to the camera unit.
When mounted, the zoom lens position detection means
It is detected that the zoom lens is in the wide macro area.
When it is issued, before the autofocus mode operation starts
In addition, this zoom lens is set to a position outside the wide macro area.
Drive command signal to move to position drive the zoom lens
It is characterized in that a drive command signal output means for outputting to the means is provided.
It is a characteristic.

Also, in order to achieve the above-mentioned first object, the second invention of the present invention is the zoom lens driving means for moving the zoom lens to perform the zooming operation, and the zoom for detecting the moving position of the zoom lens. A lens unit including a lens position detecting means is a lens control device for an interchangeable lens type camera that is detachably attached to a camera unit, and when the lens unit is attached to the camera unit, When the zoom lens position detecting means detects that the zoom lens is in the wide macro area, the zoom lens is moved out of the wide macro area before the predetermined communication between the lens unit and the camera unit is started. Drive command signal for outputting to the zoom lens drive means a drive command signal for moving to a predetermined position of It is characterized in that it comprises a force means.

In order to achieve the above-mentioned second object, a third invention of the present invention is a focus lens driving means for moving a focus lens to adjust a focus, and a focus lens position for detecting a moving position of the focus lens. A lens control device for an interchangeable-lens compatible camera, wherein a lens unit including a detection means is detachably attached to a camera unit, and when the lens unit is attached to the camera unit, When it is detected by the lens position detection means that the focus lens is in the tele-macro region, a drive command signal for moving the focus lens to a predetermined position outside the tele-macro region is driven before starting the auto-focus mode operation. Equipped with drive command signal output means for outputting to the means And it is characterized in and.

Further, in order to achieve the above object, a fourth invention of the present invention is a focus lens driving means for moving a focus lens to adjust a focus, and a focus lens position detecting means for detecting a moving position of the focus lens. Is a lens control device of an interchangeable-lens compatible camera that is detachably attached to a camera unit, wherein the lens unit is attached to the camera unit before the lens unit is attached. When the focus mode stored in the camera unit is the auto focus mode, and when the focus lens position detecting means detects that the focus lens is in the tele macro area, a predetermined distance between the lens unit and the camera unit is determined. Before starting the communication of It is characterized in that it comprises a driving instruction signal output means for outputting a drive command signal for moving to a predetermined position outside the telephoto macro region in the focus lens drive means Kasurenzu.

[0015]

In the lens control device for the interchangeable lens type camera of the first invention, the zoom lens position detecting means detects that the zoom lens is in the wide macro area when the lens unit is attached to the camera unit. Then, the drive command signal output means outputs a drive command signal for moving the zoom lens to a predetermined position outside the wide macro area to the zoom lens drive means by the drive command signal output means before the start of the autofocus mode operation. Escape outside the macro area. As a result, it is possible to greatly reduce the focusing time in the autofocus mode after the lens unit is exchanged while the zoom lens remains in the wide macro area.

Further, in the lens control device for the interchangeable lens type camera according to the second aspect of the present invention, the zoom lens may be in the wide macro area when the lens unit is mounted on the camera unit and by the zoom lens position detecting means. When detected, the drive command signal output means outputs to the zoom lens drive means a drive command signal for moving the zoom lens to a predetermined position outside the wide macro area, and the zoom lens moves outside the wide macro area. Escape. As a result, it is possible to greatly reduce the focusing time in the autofocus mode after the lens unit is exchanged while the zoom lens remains in the wide macro area.

In the lens control device for the interchangeable lens type camera of the third invention, the focus lens position detecting means detects that the focus lens is in the tele-macro region when the lens unit is attached to the camera unit. Then, before the start of the autofocus mode operation, the drive command signal output means outputs a drive command signal for moving the focus lens to a predetermined position outside the telemacro region, to the focus lens drive means,
This focus lens escapes outside the telemacro region.
As a result, it is possible to greatly reduce the focusing time in the autofocus mode after the lens unit is exchanged while the focus lens remains in the telemacro region.

Further, in the lens control device for the interchangeable lens type camera of the fourth invention, when the lens unit is mounted on the camera unit, the focus lens position detecting means detects that the focus lens is in the tele-macro region. Then, the drive command signal output means causes the focus lens driving means to move the focus lens to a predetermined position outside the telemacro region before the predetermined communication is started between the lens unit and the camera unit. A command signal is output and the focus lens escapes from the telemacro area. As a result, it is possible to significantly reduce the focusing time of the focus lens in the auto focus mode after the lens unit is exchanged while the focus lens remains in the tele-macro area.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram of an interchangeable lens type video camera to which the lens control device according to the first embodiment of the present invention is applied. In FIG. 1, 1 is an interchangeable lens type. Video camera, lens unit 2
And a camera unit 3. The lens unit 2 is detachably attached to the camera unit 3 via the mount portion 4, and at the time of attachment, various types of information such as initialization information and control information are provided by the electric contacts provided in the mount portion 4. A signal transmission line 5 for communication is formed.

In the lens unit 2, a lens group including a focus lens 6 for adjusting the focus, a zoom lens 7 for changing the magnification and performing zooming, a diaphragm 8, a relay lens 9 and the like is provided. In addition, the focus lens 6, the zoom lens 7, and the diaphragm 8 are respectively driven by motors 10 and 1 for driving them.
1, 12, and drive circuits (drive means) 13, 14, 15
Are arranged respectively. These motors 10-12,
And the drive circuits 13 to 15 control the microcomputer 1 for controlling all of the controls on the lens unit 2 side.
6, the signal transmission line 5 from the camera unit 3 side
The drive is controlled based on the control information supplied via.

The operating states of the focus lens 6, the zoom lens 7, and the diaphragm 8 are determined by the focus encoder (focus lens position detecting means) 17, the zoom encoder (zoom lens position detecting means) 18, and the diaphragm encoder 19, respectively. After being detected, the signal is taken into the microcomputer 16 on the lens unit 2 side and subjected to predetermined processing as necessary, and then the signal transmission line 5
Is transmitted to the microcomputer 25 on the camera unit 3 side which will be described later.

On the other hand, in the camera unit 3, for example, C for photoelectrically converting the subject image formed by the lens unit 2 connected to the camera unit 3 into a video signal.
An image pickup device 20 such as a CD, a preamplifier 21 for amplifying a video signal output from the image pickup device 20 to a predetermined level,
A signal processing circuit 22 which performs predetermined processing such as predetermined gamma correction, blanking processing, and addition of a sync signal on the output of the preamplifier 21 to convert and output the standardized television signal, An AF circuit 23 that detects a focus state based on a high-frequency component of a luminance signal, compares an average value of luminance signal levels of video signals with a preset reference level, and makes the luminance signal level always equal to the reference level. An AE circuit 24 that outputs a signal for controlling the diaphragm 8, a control microcomputer (drive command signal output means) 25 that controls and controls all the functions of the camera unit 3, and a zoom lens 7 are operated. A zoom switch 26 for issuing a command, an AZ mode setting switch 27 for setting an automatic zoom mode, and the like are provided.

A focus state detection signal output from the AF circuit 23, an aperture state detection signal output from the AE circuit 24,
Zoom switch 26 and AZ mode setting switch 27
Each of the operation signals is supplied to the microcomputer 25 on the camera unit 3 side, and a predetermined calculation is performed while referring to the information on the operation state returned from the microcomputer 16 on the lens unit 2 side. After being converted into a format for supplying to the microcomputer 16 on the lens unit 2 side, it is transmitted to the microcomputer 16 on the lens unit 2 side via the signal transmission line 5, and control of each part on the lens unit 2 side is performed. Done.

The AF circuit 23 is a high-pass filter (HP
F) 23 ₁ , detection circuit 23 ₂ , peak hold circuit 2
3 ₃ and an A / D conversion circuit 23 ₄ . And
The AF circuit 23 uses the high-pass filter 23 ₁ to detect the high frequency component of the luminance signal in the video signal which changes according to the focus state.
The peak value is detected every predetermined period by the peak hold circuit 23 ₃ and detected by the detection circuit 23 ₂ to be converted into a direct current level, and the A / D conversion circuit 23 ₄
After being converted into a digital signal by, the data is supplied to the microcomputer 25 on the camera unit 3 side.

The microcomputer 25 on the side of the camera unit 3 detects the peak value of the high frequency component for each predetermined period, and outputs the control information for driving the focus lens 6 in the direction in which the value becomes maximum, on the side of the lens unit 2. With reference to the aperture information from the microcomputer 16, the calculation is performed in consideration of the depth of field, and the calculation is output to the microcomputer 16 on the lens unit 2 side.

Further, the AE circuit 24 includes an integrating circuit 24 ₁ ,
It has a comparison circuit 24 ₂ and an A / D conversion circuit 24 ₃ . Then, the AE circuit 24 obtains the light amount information by integrating the luminance signal component YC-separated by the low-pass filter or the like in the signal processing circuit 22 by the integrating circuit 24 ₁ . The light quantity information and a preset reference quantity level are compared by the comparison circuit 24 ₂ , and the difference information is converted into a digital signal by the A / D conversion circuit 24 ₃ and the microcomputer 25 on the camera unit 3 side. To generate a control signal for driving the diaphragm 8 so that the luminance signal level matches the reference amount level. On the lens unit 2 side, based on the control signal,
A drive signal is output from the microcomputer 16 to the diaphragm drive circuit 15 in the lens unit 2, and the diaphragm drive circuit 15 drives and controls the diaphragm 8. As a result, the amount of light input to the camera unit 3 side changes, and a control loop is finally formed so that the aperture value becomes appropriate.

The AZ mode is operated by operating the AZ mode setting switch 27, and the change of the object distance is corrected by changing the magnification to keep the angle of view constant. When the subject distance is changed by, the microcomputer 25 on the camera unit 3 side supplies the zoom encoder information, that is, the focal length information and the focus encoder information, that is, the subject distance information, supplied from the microcomputer 16 on the lens unit 2 side. Based on the above, the change in the subject distance is discriminated, the magnification for correcting the change in the angle of view due to the change in the subject distance, that is, the control information of the zoom lens 7 is calculated, and this is calculated by the microcomputer on the lens unit 2 side. Send to 16. Then, on the lens unit 2 side, a drive command signal is output from the microcomputer 16 to the zoom lens drive circuit 14 based on the transmitted information, and the zoom lens drive circuit 14 causes the zoom lens drive circuit 14 to display an image within the image pickup screen of the subject. The zoom lens 7 is drive-controlled to keep the angle of view constant. In addition, in FIG.
28 is a video signal output terminal.

Now, consider the case where the lens unit 2 is attached to the camera unit 3 in FIG. When the lens unit 2 is attached to the camera unit 3, the microcomputer 25 on the camera unit 3 side obtains predetermined initial information from the microcomputer 16 on the lens unit 2 side via the signal transmission line 5. After that, the actual control is started, but the microcomputer 25 on the camera unit 3 side is connected via the signal transmission line 5.
If the zoom encoder information obtained by the above, that is, the position information of the zoom lens 7 indicates the wide macro area, it means that the lens unit 2 with the zoom lens 7 stopped in the wide macro area is attached to the camera unit 3. Become.
At this time, the microcomputer 25 on the camera unit 3 side sends a drive command signal to the zoom lens drive circuit 14 of the lens unit 2 via the signal transmission line 5 before the start of the autofocus mode operation. Give until the information no longer points to a wide macro area.

The internal processing operation of the microcomputer 25 on the camera unit 3 side at this time will be described with reference to the flowchart of FIG.

FIG. 2 shows a routine which is executed immediately before the communication between the microcomputers 16 and 25 of the lens unit 2 and the camera unit 3 is completed and the autofocus mode routine is started.

First, in step 201, it is determined whether or not the processing of this routine is completed after the lens unit 2 is attached to the camera unit 3. If it is finished, the routine exits without doing anything. If the processing of this routine is not completed, the process proceeds to step 202, and it is determined whether or not the zoom encoder information obtained by the communication with the microcomputer 16 on the lens unit 2 side is within the wide macro area, and the wide angle is determined. If it is not in the macro area, step 203 is executed to exit this routine. Also,
If the zoom encoder information is within the wide macro area, the routine proceeds to step 204, where the zoom lens 7 is moved to the zoom lens driving circuit 14 at a predetermined position outside the wide macro area,
For example, a drive command signal for moving to the closest end of the normal area is output.

By placing the above processing routine immediately before the autofocus mode routine, the control operation of the apparatus of the present invention is executed.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG.

The block configuration of the interchangeable-lens type video camera to which the lens control device according to the present embodiment is applied is the same as that of FIG. 1 described above, and therefore FIG.

This embodiment differs from the first embodiment described above in that, when the lens unit 2 is attached to the camera unit 3, first, the microcomputer 16 on the lens unit 2 side performs a predetermined initial process. After that, a predetermined initial information is sent to the microcomputer 25 on the camera unit 3 side through the signal transmission line 5, and
When the position information of the zoom lens 7 indicates the wide macro area, when the lens unit 2 with the zoom lens 7 stopped in the wide macro area is attached to the camera unit 3, the microcomputer 16 on the lens unit 2 side Before starting the initial communication between the lens unit 2 and the camera unit 3, a drive command signal is sent to the zoom lens drive circuit 14 of the lens unit 2 via the signal transmission line 5, and the zoom encoder information is transmitted. It is a point that is given until the wide macro area is not shown.

The internal processing operation of the microcomputer 16 on the lens unit 2 side at this time will be described with reference to the flowchart of FIG.

FIG. 3 shows a routine which is processed immediately before entering the initial communication routine between the microcomputers 16 and 25 of the lens unit 2 and the camera unit 3.

First, in step 301, the microcomputer 16 of the lens unit 2 performs a normal initial process. Next, in step 302, it is determined whether or not the zoom encoder information obtained by communication with the microcomputer 25 on the camera unit 3 side is in the wide macro area, and if it is not in the wide macro area, step 303 is executed. Then exit the initial communication routine. If the zoom encoder information is within the wide macro area, the process proceeds to step 304 and the zoom lens drive circuit 14
On the other hand, a drive command signal for moving the zoom lens 7 to a predetermined position outside the wide macro area, for example, to the closest end of the normal area is output, and the process returns to step 302.

By placing the above processing routine immediately before the initial communication routine between the lens unit 2 and the camera unit 3, the control operation of the apparatus of the present invention is executed.

In the above embodiment, the drive command signal for the zoom lens drive circuit 14 is output immediately before the initial communication between the lens unit 2 and the camera unit 3 is started. However, the present invention is not limited to this, as long as the zoom encoder information is communicated from the microcomputer 16 of the lens unit 2 to the microcomputer 25 of the camera unit 3 via the signal transmission line 5.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG.

The block configuration of the interchangeable-lens type video camera to which the lens control device according to the present embodiment is applied is the same as that in FIG. 1 described above, and therefore FIG.

The present embodiment differs from the first and second embodiments described above in that the focus encoder information obtained by the microcomputer 25 on the camera unit 3 side via the signal transmission line 5, that is, the focus lens 6 information. When the position information indicates the tele-macro region, when the lens unit 2 with the focus lens 6 stopped in the tele-macro region is attached to the camera unit 3, the microcomputer 25 on the camera unit 3 side performs the auto focus mode operation. Before starting, a drive command signal is given to the focus lens drive circuit 13 of the lens unit 2 via the communication transmission line 5 until the focus encoder information does not indicate the telemacro region.

The internal processing operation of the microcomputer 25 on the camera unit 3 side at this time will be described with reference to the flowchart of FIG.

FIG. 4 shows a routine which is processed immediately before the automatic focus mode routine is entered after the communication between the microcomputers 16 and 25 of the lens unit 2 and the camera unit 3 is completed.

First, in step 401, it is determined whether or not the processing of this routine is completed after the lens unit 2 is attached to the camera unit 3. If it is finished, the routine exits without doing anything. If the processing of this routine is not completed, the process proceeds to step 402, and it is determined whether or not the focus encoder information obtained by the communication with the microcomputer 16 on the lens unit 2 side is in the tele macro area, and the tele macro area is determined. If not, step 403 is executed to exit this routine. Also,
If the focus encoder information is within the tele macro area, the process proceeds to step 404, and the focus lens drive circuit 1
A drive command signal for moving the focus lens 6 to a predetermined position outside the telemacro region, for example, to the closest end of the normal region, is output to the lens 3.

The control operation of the apparatus of the present invention is executed by placing the above processing routine immediately before the autofocus mode routine.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described with reference to FIG.

The block configuration of the interchangeable lens type video camera to which the lens control device according to the present embodiment is applied is the same as that of FIG. 1 described above, and therefore FIG.

The difference of this embodiment from the above-mentioned first to third embodiments is that the lens unit 2 is the camera unit 3.
First, the microcomputer 16 on the lens unit 2 side performs predetermined initial processing and then sends predetermined initial information to the microcomputer 25 on the camera unit 3 side via the signal transmission line 5. If the point and the position information of the focus lens 6 indicate the tele-macro region, the lens unit 2 with the focus lens 6 stopped in the tele-macro region is the camera unit 3.
When mounted on the lens unit 2, the microcomputer 16 on the lens unit 2 side sends a drive command signal to the focus lens drive circuit 13 of the lens unit 2 before starting the initial communication between the lens unit 2 and the camera unit 3. , The focus encoder information is given via the signal transmission line 5 until the tele-macro region is not shown.

The internal processing operation of the microcomputer 16 on the lens unit 2 side at this time will be described with reference to the flowchart of FIG.

FIG. 5 shows a routine that is executed immediately before entering the initial communication routine between the microcomputers 16 and 25 of the lens unit 2 and the camera unit 3.

First, in step 501, the microcomputer 16 of the lens unit 2 performs a normal initial process. Next, in step 502, it is determined whether the focus encoder information obtained by communication with the microcomputer 25 on the camera unit 3 side is in the telemacro area. If it is not in the telemacro area, the initial communication routine in step 503. Exit through. If the focus encoder information is within the tele-macro area, the process proceeds to step 504 to drive the focus-lens driving circuit 13 to drive the focus lens 6 to a predetermined position outside the tele-macro area, for example, to the closest end of the normal area. Is output and the process returns to step 502.

The above processing routine is executed by the lens unit 2
The control operation of the device of the present invention is executed immediately before the initial communication routine between the camera unit 3 and the camera unit 3.

In this embodiment, the drive command signal for the focus lens drive circuit 13 is output immediately before the initial communication between the lens unit 2 and the camera unit 3 is started, but the output timing of this signal is The present invention is not limited to this, as long as focus encoder information is communicated from the microcomputer 16 of the lens unit 2 to the microcomputer 25 of the camera unit 3 via the signal transmission line 5.

In each of the above embodiments, the case where the lens control device of the present invention is applied to a video camera has been described, but the present invention is not limited to this, and an interchangeable lens in which the lens unit is detachably attached to the camera unit is supported. Widely applicable to type cameras.

[0058]

As described above, according to the lens control device for the interchangeable lens type camera in the first aspect of the present invention, the lens unit is mounted on the camera unit while the zoom lens is in the wide macro area. In this case, if the zoom lens is moved to a predetermined position outside the wide macro area, that is, the normal area before the auto focus mode operation is started, the normal area auto focus mode is set. The time is greatly reduced.

According to the lens control device for the interchangeable lens type camera in the second aspect of the present invention, when the lens unit is mounted on the camera unit while the zoom lens is still in the wide macro area, the lens unit The zoom lens at a predetermined position outside the wide macro area before starting a predetermined communication between the camera unit and the camera unit,
That is, by moving to the normal area, the autofocus mode of the normal area is set, so that the focusing time in the autofocus mode is significantly shortened.

Further, according to the lens control device for the interchangeable lens type camera in the third aspect of the present invention, when the lens unit is attached to the camera unit while the focus lens of the lens unit is in the tele-macro area, the auto focus mode is set. By moving the focus lens to a predetermined position outside the telemacro region before starting the operation, that is, to the normal region, the autofocus mode of the normal region is set, and thus the focusing time in the autofocus mode is significantly shortened.

Further, according to the lens control device of the interchangeable lens type camera in the fourth aspect of the present invention, when the lens unit is mounted on the camera unit while the zoom lens is in the wide macro area, the lens unit The zoom lens at a predetermined position outside the wide macro area before starting a predetermined communication between the camera unit and the camera unit,
That is, by moving to the normal area, the autofocus mode of the normal area is set, so that the focusing time in the autofocus mode is significantly shortened.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an interchangeable lens type camera to which a lens control device according to a first exemplary embodiment of the present invention is applied.

FIG. 2 is a flow chart for explaining a control operation of the lens control device according to the first embodiment of the present invention.

FIG. 3 is a flow chart for explaining a control operation of the lens control device according to the second embodiment of the present invention.

FIG. 4 is a flow chart for explaining a control operation of the lens control device according to the third example of the present invention.

FIG. 5 is a flow chart for explaining a control operation of the lens control device according to the fourth example of the present invention.

[Explanation of reference numerals] 1 video camera (camera compatible with interchangeable lens) 2 lens unit 3 camera unit 6 focus lens 7 zoom lens 13 drive circuit (focus lens drive means) 14 drive circuit (zoom lens drive means) 17 focus encoder (focus Lens position detection means) 18 Zoom encoder (zoom lens position detection means) 25 Microcomputer (drive command signal output means)

Claims (4)

[Claims] 1. A lens unit provided with a zoom lens driving means for moving a zoom lens to perform a zooming operation and a zoom lens position detecting means for detecting a moving position of the zoom lens is detachably attached to a camera unit. A lens control device for an interchangeable lens compatible camera to be mounted,
When the lens unit is attached to the camera unit, and when the zoom lens position detecting means detects that the zoom lens is in the wide macro area, the zoom lens is moved before the autofocus mode operation starts. A lens control device for an interchangeable lens type camera, comprising drive command signal output means for outputting a drive command signal for moving the zoom lens drive means to a predetermined position outside the wide macro area. 2. A lens unit provided with a zoom lens driving means for moving a zoom lens to perform a magnification change operation and a zoom lens position detecting means for detecting a moving position of the zoom lens is detachably attached to a camera unit. A lens control device for an interchangeable lens compatible camera to be mounted,
When the lens unit is mounted on the camera unit, and when the zoom lens position detecting unit detects that the zoom lens is in the wide macro area, a predetermined distance between the lens unit and the camera unit is determined. Compatible with the interchangeable lens, further comprising drive command signal output means for outputting to the zoom lens drive means a drive command signal for moving the zoom lens to a predetermined position outside the wide macro area before starting the communication. Type lens control device. 3. A lens unit equipped with a focus lens driving means for moving a focus lens to adjust a focus and a focus lens position detecting means for detecting a moving position of the focus lens is detachably attached to a camera unit. A lens control device for an interchangeable-lens compatible camera, wherein the focus lens position detecting means detects that the focus lens is in a tele-macro region when the lens unit is mounted on the camera unit. When the automatic focus mode operation is started, a drive command signal output means for outputting a drive command signal for moving the focus lens to a predetermined position outside the telemacro region is provided to the focus lens drive means. Lens control device for interchangeable lens compatible camera . 4. A lens unit equipped with a focus lens driving means for moving a focus lens to adjust a focus and a focus lens position detecting means for detecting a moving position of the focus lens is detachably attached to a camera unit. A lens control device for an interchangeable lens compatible camera, wherein the focus mode stored in the camera unit before the lens unit is mounted is an autofocus mode when the lens unit is mounted in the camera unit. Moreover, when it is detected by the focus lens position detecting means that the focus lens is in the tele macro area, the focus lens is moved to the tele macro area before the predetermined communication between the lens unit and the camera unit is started. Move to a predetermined position outside A lens control device for an interchangeable lens type camera, comprising drive command signal output means for outputting a drive command signal for moving the focus lens drive means.