JPH1115035A - Camera system, camera body and interchangeable lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera system, a camera body and an interchangeable lens, capable of enhancing the effect for correcting a blur even if photographing magnification is high. SOLUTION: The camera body l is provided with a CCD 10 and the interchangeable lens 2 is provided with a blur correcting lens 20. A body side CPU 14 restores a subject to an image without the blur, based on the angular velocity information of an angular velocity sensor 23 and the image information of the CCD 10. A lens side CPU 24 calculates a blur correction value and executes the driving control of a blur correcting driven 7 part 200, based on the angular velocity information and further, the photographing magnification, based on information of a focal distance and a subject distance. When the photographing magnification is lower than a prescribed value, the driving control of the side of the blur correcting lens 20 is executed by the lens side CPU 24. On the other hand, when the photographing magnification is larger than the prescribed value, the body side CPU 14 corrects the blur, based on the image information of the CCD 10, because the influence of a parallel blur is great.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera system, a camera body, and an interchangeable lens equipped with a shake correcting device for correcting shake.

[0002]

2. Description of the Related Art A digital still camera easily performs transmission and reception of data through a communication line, processing of image data, and the like by capturing captured video as data. Among such digital still cameras, there is a type in which an interchangeable lens for a conventional silver halide camera can be mounted as it is. For this reason, the photographer can enjoy photographing in the same manner as a silver halide camera by purchasing only the digital still camera body and mounting an interchangeable lens for the silver halide camera.

On the other hand, in the field of silver halide cameras, a technique for driving a blur correction optical system in accordance with an output signal of a sensor for detecting camera shake and the like to correct blur is established following AF and AE techniques. It is getting. Such camera shake can occur in a digital still camera as well as in a silver halide camera. A digital still camera hardly has a mechanical shutter like a silver halide camera, but there is a concept of a shutter speed like the silver halide camera.
The shutter speed in a digital still camera is
CCD (Charge Coupled Device)
e; charge transfer time of the charge transfer element), which varies according to the photometric value as in the case of the silver halide camera. Then, the blur generated in the imaging device during the charge accumulation time is stored as a blurred image in a memory in the imaging device.

[0004]

The conventional camera is A
Various technologies such as F, AE, blur correction, and electronic recording have been added, and the problem of power consumption of the camera has become more serious. In particular, the conventional image stabilization apparatus consumes a particularly high amount of power when operations such as mirror operation, aperture driving, AF driving, and image stabilization operations overlap with each other. Frequent battery replacement may have been required. Conventional shake correction devices detect camera shake with an angular velocity sensor.However, when the shooting magnification is high, the effect of "parallel shake" of the camera increases, making it difficult to correct shake with the shake correction optical system. Could be. As described above, there is a problem that even if the blur correction is difficult, driving the blur correction optical system consumes more power. Here, the parallel blur is not a blur with an angular velocity generated when a camera held by a human body rotates around an axis (shoulder, arm, elbow, etc.) of the human body. Refers to blurring caused by, for example, translating in the horizontal direction in a direction in which no blur occurs.

An object of the present invention is to provide a camera system capable of improving a blur correction effect even for a parallel blur,
It is to provide a camera body and an interchangeable lens.

[0006]

The present invention solves the above-mentioned problems by the following means. In addition, in order to make it easy to understand, description is given with reference numerals corresponding to the embodiment of the present invention, but the present invention is not limited to this. That is, the invention of claim 1 includes a first (20) and a second blur correction unit (10), a first operating unit (200) for operating the first blur correction unit, and the second A second operating unit (14) for operating a shake correcting unit; and a control unit (14, 24) for controlling the first and the second operating unit, wherein the control unit is configured to change a shooting magnification. , The first or the second operating unit is operated (S500, S2000).

According to a second aspect of the present invention, in the camera system according to the first aspect, when the photographing magnification is equal to or more than a predetermined value, the control unit activates the second operating unit (S200).
0), and when the shooting magnification is smaller than a predetermined value, the first operating section is operated (S500).

[0008] The invention of claim 3 is claim 1 or claim 2.
In the camera system described in (1), the first blur correction unit includes a blur correction optical system (2) that changes an optical path of a photographing optical system.
0), the second blur correction unit includes an image information conversion unit (10) that converts a subject image into image information, and the first operating unit includes a driving unit that drives the blur correction optical system. (200), wherein the second operating section includes an image restoration section (14) for restoring the subject image to a blur-free image.

According to a fourth aspect of the present invention, in the camera system according to the third aspect, a blur detecting section (23) for detecting blur and outputting blur detection information (S200); A calculation unit (24) for calculating shake correction information according to the shake correction amount, wherein the control unit drives the drive unit based on the shake correction information (S50).
0), and the image restoration unit restores the subject image to an image without blur based on the shake correction information and the image information (S2000).

According to a fifth aspect of the present invention, there is provided a camera body mountable on an interchangeable lens (2) including a lens-side blur correcting section (20) and a lens-side operating section (200) for operating the lens-side blur correcting section. In (1), a body-side shake correcting section (10), a body-side operating section (14) for operating the body-side shake correcting section, and a body-side control section (14) for controlling the body-side operating section. The body-side control unit operates the body-side operation unit (S2000) or instructs the interchangeable lens to operate the lens-side operation unit (S500) according to a shooting magnification. It is a camera body.

According to a sixth aspect of the present invention, in the camera body according to the fifth aspect, when the photographing magnification is equal to or more than a predetermined value, the control section activates the body-side operation section (S200).
0), and when the photographing magnification is smaller than a predetermined value, the operation of the lens side operation unit is instructed to the interchangeable lens side (S
500).

The invention of claim 7 is the invention of claim 5 or claim 6.
Wherein the body-side blur correction unit includes an image information conversion unit (10) that converts a subject image into image information, and the body-side operation unit restores the subject image to a blur-free image. A camera body comprising an image restoration unit (14).

According to an eighth aspect of the present invention, in the camera body according to the seventh aspect, a shake detecting section (13) for detecting a shake and outputting shake detection information (S200), based on the shake detection information, A calculation unit (14) for calculating shake correction information according to a shake correction amount, wherein the body-side control unit shifts a subject image by the image restoration unit based on the shake correction information and the image information. A camera body characterized by restoring (S2000) to a missing image.

According to a ninth aspect of the present invention, in the camera body according to the seventh aspect, an output from the interchangeable lens side (S20).
0) a calculation unit (14) for calculating shake correction information according to a shake correction amount based on the shake detection information, wherein the body-side control unit performs a calculation based on the shake correction information and the image information; A camera body characterized in that a subject image is restored to a blur-free image by the image restoration unit (S2000).

According to a tenth aspect of the present invention, there is provided an interchangeable lens mountable on a camera body (1) including a body-side shake correcting section (10) and a body-side operating section (14) for operating the body-side shake correcting section. In (2), a lens-side shake correction unit (20), a lens-side operation unit (200) that operates the lens-side shake correction unit, and a lens-side control unit (24) that controls the lens-side operation unit The lens-side control unit operates the lens-side operation unit in accordance with a photographing magnification (S
500) or instructs the camera body side to operate the body side operation unit (S2000).

According to an eleventh aspect of the present invention, in the interchangeable lens according to the tenth aspect, when the photographing magnification is equal to or more than a predetermined value, the lens-side control unit stops the lens-side operating unit (S800). When is smaller than a predetermined value, the lens-side operating section is operated (S500).

According to a twelfth aspect of the present invention, in the interchangeable lens according to the tenth aspect, the lens side control unit instructs the camera body side to operate the body side operation unit when the photographing magnification is equal to or more than a predetermined value. (S2000) When the photographing magnification is smaller than a predetermined value, the lens-side operating section is operated (S500).

According to a thirteenth aspect of the present invention, in the interchangeable lens according to any one of the tenth to twelfth aspects, the lens-side blur correction unit changes a light path of a photographing optical system. (20), wherein the lens-side operating unit includes a lens-side driving unit (200) for driving the blur correction optical system.

According to a fourteenth aspect of the present invention, there is provided the interchangeable lens according to the thirteenth aspect, wherein a blur detecting unit (23) for detecting blur and outputting blur detection information (S200); A calculation unit (24) for calculating shake correction information according to a shake correction amount, wherein the lens-side control unit drives the lens-side drive unit based on the shake correction information (S500). This is an interchangeable lens.

According to a fifteenth aspect of the present invention, in the interchangeable lens according to the thirteenth aspect, the output (S
200) a calculation unit (24) for calculating blur correction information according to the blur correction amount based on the blur detection information obtained;
The lens-side control unit, based on the blur correction information,
The interchangeable lens is characterized in that the lens-side driving unit is driven (S500).

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of the present invention will now be described with reference to the drawings.
The embodiment will be described in more detail. First, a camera system according to a first embodiment of the present invention will be described using a single-lens reflex camera equipped with a shake correction function as an example. FIG. 1 is a sectional view showing a camera system according to the first embodiment of the present invention.

(Camera System) As shown in FIG. 1, a camera system according to the first embodiment of the present invention includes a CCD 10, a finder optical system 11 for inverting an image on a screen 11a by a pentaprism, and a mirror driving unit. A camera body 1 including a camera body 12 and a body-side CPU 14, and the camera body 1 is detachably mounted on the camera body 1, and includes a shake correction lens 20, a lens driving unit 200, a position detecting unit 23
0, an interchangeable lens 2 including an angular velocity sensor 23, a lens-side CPU 24, and the like.

(Camera Body) The CCD 10 is a photoelectric conversion element for converting a subject image transmitted through a photographing optical system into image information. The CCD 10 is disposed behind a quick return mirror 120 provided in the camera body 1 as shown in FIG.
0 is attached to the camera body 1.

The mirror driving section 12 is for retracting the quick return mirror 120 from the photographing light beam during the photographing operation. As shown in FIG. 1, the mirror driving unit 12
The quick return mirror 120 is disposed behind the photographing optical system and distributes the light flux transmitted through the photographing optical system to the finder optical system 11. The mirror driving unit 12 includes, for example, a mechanism that drives a cam and a link by a DC motor to drive the quick return mirror 120, and a mechanism that drives the quick return mirror 120 up by a spring.

The body side CPU 14 includes, for example, the CCD 1
0, based on the image data and the blurring data when the image data is output, the restoration to the original image without blurring, and the ON operation of the release switch 143 based on the image data and the blurring data when the image data is output. And a central processing unit that controls the start or stop of the image restoration process, the drive control of the mirror driving unit 12, and the like. The body side CPU 14 has C
CD 10, mirror driving unit 12, lens side CPU 24
A shake data memory 140 for storing the shake amount calculated by the above as shake data, an image data memory 141 for writing image data compressed by the body-side CPU 14,
The release switch 143 is connected. Further, the body side CPU 14 controls the lens side C via the lens contact 3.
Communication with the PU 24 is possible.

The release switch 143 is a switch for starting a series of photographing preparation operations by half-pressing operation and starting a photographing operation such as driving of the mirror driving unit 12 by full-pressing operation.

(Interchangeable Lens) The blur correction lens 20 constitutes a part or the whole of the photographing optical system, and is a lens that corrects blur by being driven in a direction perpendicular to the optical axis I. When the interchangeable lens 2 is mounted on the camera body 1, the vibration reduction lens 20
Located in front of. The outer peripheral portion of the blur correction lens 20 is held by the inner peripheral portion of the lens frame 20a.

The lens driving unit 200 drives the shake correction lens 20 in a plane perpendicular to the optical axis I (in the xy plane in the figure) by an electromagnetic driving method. The lens driving unit 200 is arranged on a yoke 205 attached to the attachment member 210, a magnet 204 for forming a magnetic field between the yoke 205, and the yoke 205 and the magnet 204, and attached to the lens frame 20a. And a yoke 20 attached to the surface of the mounting member 220 on the lens frame 20a side to fix the magnet 204.
2 and four thin wires 203 (two of which are not shown) that constitute a kind of link mechanism and movably support the lens frame 20a in the xy plane. When the coil 201 is energized, the lens driving unit 200 generates a force in the direction of the arrow in the figure to drive the blur correction lens 20. Note that the lens driving unit 200 generates a driving force in the pitch direction (y-axis direction) and a driving unit that generates a driving force in the yaw direction (x-axis direction) has the same structure as the lens driving unit 200.
Illustration is omitted.

The position detecting section 230 detects the position of the shake correcting lens 20 in a plane perpendicular to the optical axis I. The position detection unit 230 includes an IRED 231 attached to the attachment member 210, a one-dimensional PSD 233 attached to the attachment member 220, an IRED 231 and a PSD.
233, and is attached to the outer peripheral portion of the lens frame 200, and includes a slit member 232 for restricting a light beam from the IRED 231. The position detector 230 detects the position of the light that moves on the PSD 233 by the movement of the slit member 232, and outputs drive amount information on the drive position of the blur correction lens 20 to the lens-side CPU 24. Note that the position detection unit 230
The position detection unit that detects the position of the shake correction lens 20 in the pitch direction (y-axis direction) and detects the position of the shake correction lens 20 in the yaw direction (x-axis direction) has the same structure as the position detection unit 230. Illustration is omitted.

The angular velocity sensor 23 is a sensor that monitors a shake occurring in the interchangeable lens 2 and outputs angular velocity information (shake detection information) corresponding to the shake. Angular velocity sensor 23
Is a filter 230 that cuts high-frequency noise components.
The detected blur detection information is output.

The lens-side CPU 24 calculates target drive position information (shake correction information) of the shake correction lens 20 according to the shake amount (shake correction amount), and instructs the lens drive unit 200 to drive or stop driving. Or focus detection unit 2
Based on the focus detection information output from 41 and the subject distance information output from the focusing lens position detection unit 243,
It is a central processing unit for calculating a photographing magnification. The lens CPU 24 includes a filter 230 and a position detection unit 230.
And an EEPROM in which various information on the interchangeable lens 2 (hereinafter referred to as lens information) is written.
240, a TTL focus detection unit 241 that detects illuminance by subject light that has passed through the imaging optical system and outputs focal length information about the focal length, and a focusing lens (not shown), for example, by an optical rotary encoder or the like. A focusing lens position detection unit 243 that detects a position in the direction of the optical axis I and outputs subject distance information relating to a distance to the subject; and a PWM (Pulse Width Mo).
duration) driver 242 and camera body 1
A shake correction start switch 244 that is equivalent to a half-press function of the release switch 143 provided on the side and starts the shake correction system by an ON operation is connected.

FIG. 2 is a block diagram showing a process of calculating the amount of blur by the lens-side CPU in the camera system according to the first embodiment of the present invention. The lens-side CPU 24
For example, a low-frequency component (reference value (omega zero value) ω of the blur correction control) is obtained from the output signal (angular velocity information) of the filter 230 by a moving average method, a digital filter, or the like.
0) is extracted. Then, the lens-side CPU 24 outputs angular displacement information by subtracting and integrating the low frequency component from the angular velocity information. The lens-side CPU 24 obtains the blur amount by multiplying the angular displacement information by the focal length information (focal length f) output from the focus detection unit 241. The lens-side CPU 24 outputs the shake amount as shake data to the body-side CPU 14 via the lens contact 3, and the body-side CPU 14 stores the shake data in the shake data memory 140. The lens-side CPU 24
It consists of a function of the subject distance information (subject distance D) output from the focusing lens position detector 243 and the focal length f,
The correction coefficient α representing the moving amount of the image with respect to the moving amount of the shake correcting lens 20 is calculated. Then, the lens side CPU 24
Multiplies the shake amount by the correction coefficient α to obtain target drive position information of the shake correction lens 20.

The lens-side CPU 24 includes a blur correction lens 2
The difference between the drive amount information output from the position detector 230 and the target drive position information is calculated so that 0 is appropriately driven to the target drive position. Then, the lens side CPU 24 uses the target drive position information corrected so that the shake correction lens 20 falls within the drive range as the drive command value, and outputs the PWM driver 2
42. The PWM driver 242 applies a drive voltage to the coil 201 of the lens drive unit 200 at a duty according to the drive command value, and drives the blur correction lens 20. Further, the lens-side CPU 24 instructs the lens driving unit 200 to drive or stop driving based on the ON operation or the OFF operation of the shake correction start switch 244.

Next, the operation of the camera system according to the first embodiment of the present invention will be described. FIG. 3 is a flowchart illustrating the operation of the camera system according to the first embodiment of the present invention. In step (hereinafter, referred to as S) 100, release switch 143 performs a half-press operation. This flowchart starts when the release switch 143 is half-pressed. The body-side CPU 14 turns on a half-press timer (not shown) simultaneously with the half-press operation of the release switch 143. It should be noted that the flowchart shown in FIG. 4 is for when blur correction is performed, and when blur correction is not performed, a normal camera operation is performed.

At S200, the angular velocity sensor 23
N operations are performed. A power supply unit (not shown) supplies power to the angular velocity sensor 23 via the lens contact 3 in synchronization with the half-press ON operation, and the angular velocity sensor 23 performs an ON operation (power supply O).
N). Since the angular velocity sensor 23 has an unstable period at the time of rising, the angular velocity sensor 23 is turned on immediately after half-pressing. The angular velocity sensor 23 detects vibration generated in the camera body 1 and the interchangeable lens 2 and outputs the detected blur detection information to the lens-side CPU 24 via the filter 230.

At S300, the blur correction lens 20 is unlocked. The lens-side CPU 24 instructs a lock mechanism (not shown) to unlock the blur correction lens 20, and the lock mechanism releases the lock of the blur correction lens 20.

In S400, distance measurement and photometry are performed. The focus detection unit 241 detects illuminance due to subject light that has passed through the imaging optical system, and outputs focal length information to the lens-side CPU 24. Thereafter, the focusing lens is driven in the direction of the optical axis I by AF driving, and the position detection unit 243 detects the position of the focusing lens and outputs subject distance information to the lens-side CPU 24.

In S450, the lens-side CPU 24 calculates a photographing magnification. In S400, after the distance measurement, the photometry, and the AF driving are performed, the lens-side CPU 24 determines the photographing magnification β based on the subject distance information and the focal length information.
Is calculated.

In S500, the drive of the blur correction lens 20 is controlled. The lens-side CPU 24 calculates the amount of blur based on the blur detection information, subject distance information, focal length information, and lens information output from the angular velocity sensor 23. The lens-side CPU 24 controls the drive of the shake correction lens 20 based on the target drive position information corresponding to the shake amount.

In S550, the body side CPU 14
Determines whether the half-press timer is operating OFF. When the half-press timer is OFF (time-up), the process proceeds to S1800, and when the half-press timer is not OFF, the process proceeds to S600.

In S1800, the blur correction lens 20
Stops driving. The body-side CPU 14 issues a blur correction stop command via the lens contact 3 to the lens-side CPU 24.
Output to The lens-side CPU 24 instructs the lens driving unit 200 to stop driving the blur correction lens based on the blur correction stop command, and stops the blur correction control.

In step S1900, the blur correction lens 20
Is locked. The lens-side CPU 24 instructs the lock mechanism to start locking the blur correction lens 20. Also,
The power supply unit stops supplying power to the angular velocity sensors 13 and 23, and the angular velocity sensor 23 is turned off.

In S600, the body side CPU 14
Determines whether the release switch 143 is fully pressed. When the release switch 143 is fully pressed, the process proceeds to S700, and the release switch 1 is pressed.
When the button 43 is not fully pressed, the process returns to S400, and the distance measurement and the photometry are repeatedly performed.

In S700, the quick return mirror 120 moves up. The body-side CPU 14 instructs the mirror driving unit 12 to raise the mirror, and the quick return mirror 120 retreats from the imaging optical path to a dotted line position shown in FIG.

In S710, it is determined whether or not the photographing magnification β is larger than 0.2. When the photographing magnification β is 0.2 or more, the lens-side CPU 24 determines that the effect is small even if the optical blur correction is performed because the influence of the parallel blur is large, and proceeds to S800. On the other hand, the photographing magnification β
Is smaller than 0.2, the lens-side CPU 24
Continues the drive control of the blur correction lens 20, and the body-side CPU 14 controls the drive of an aperture mechanism (not shown) in S720. Then, in S730, the image data memory 140 fetches the image data, and
The PU 14 controls the drive to open the aperture in S740, and instructs the mirror driving unit 12 to lower the mirror in S750.

In S800, the blur correction lens 20 is locked. The body-side CPU 14 outputs a blur correction stop command to the lens-side CPU 24 via the lens contact 3. The lens-side CPU 24 instructs the lens driving unit 200 to stop driving the blur correction lens based on the command to stop the blur correction, and instructs the lock mechanism to lock the blur correction lens 20. In step S800, the locking mechanism locks the shake correction lens 20, but the lens-side CPU 24 continues to calculate the amount of shake based on the angular velocity information of the angular velocity sensor 23, and
The shake data is output to U14.

In step S900, aperture driving is started. The drive of a not-shown aperture mechanism is controlled.

At S1100, image data is fetched. The CCD 10 accumulates electric charges and performs photographing. The body-side CPU 14 performs a data compression process on the image data stored in the CCD 10 and writes the compressed data into the image data memory 141.

At S1150, shake data is captured. The body-side CPU 14 writes shake data into the shake data memory 140 when the CCD 10 outputs image data (at the time of shooting).

In S1300, the aperture opening drive is started. The drive of an aperture mechanism (not shown) is controlled, and the aperture is opened.

In step S1400, the blur correction lens 20
Is unlocked. The body-side CPU 14 issues a blur correction start command via the lens contact 3 to the lens-side CPU.
24. The lens-side CPU 24 instructs a lock mechanism (not shown) to unlock the shake correction lens 20 based on the shake correction start command, and the lock mechanism releases the lock of the shake correction lens 20.

In step S1500, the blur correction lens 20
Is drive-controlled. The lens-side CPU 24 detects the blur detection information, the subject distance information output from the angular velocity sensor 23,
The shake amount is calculated based on the focal length information and the lens information. The lens-side CPU 24 controls the drive of the shake correction lens 20 based on the target drive position information corresponding to the shake amount.

In S1600, the quick return mirror 120 goes down. The body-side CPU 14 instructs the mirror driving unit 12 to lower the mirror, and the quick return mirror 120 is driven from the dotted line position shown in FIG.

In S2000, the image data restoration unit restores the image. The body-side CPU 14 restores an image based on the image data stored in the image data memory 141 and the blur data stored in the blur data memory 140. Since such an image data restoration method is disclosed in Japanese Patent Application Laid-Open No. 6-118468, the method will be briefly described below. Body side C
The PU 14 stores the recorded value of the blur data stored in the blur data memory 140 at each sampling time (for example, 1 m
(every second). Then, the body side CPU 14
Calculates the trajectory of the blur based on the recorded value, and calculates the blur correction function from the trajectory of the blur. Since the peripheral portion of the image data includes data obtained in the middle of the blur and data lost in the middle of the blur, the body-side CPU 14 cannot perform image restoration properly. For this purpose, the body side CPU
14 reads the image data stored in the image data memory 141, and cuts the periphery of the image data from the trajectory of the blur by the maximum value of the blur amount. And the body side CPU
Reference numeral 14 performs an operation for correcting image data using a blur correction function.

In S2100, the restored image data is recorded. The body-side CPU 14 overwrites the image data after restoration on the image data before restoration stored in the image data memory 141. After recording the restored image data, the process returns to S400.

In the camera system according to the first embodiment of the present invention, the lens-side CPU 24 calculates the photographing magnification β, and when the photographing magnification β is a predetermined value or more, the body-side CPU 14 restores the image data to an image without blur. doing. On the other hand, when the photographing magnification β is smaller than the predetermined value, the lens-side CPU 24 controls the driving of the lens driving unit 200. When the photographing magnification β is equal to or more than the predetermined value, the effect of the parallel shake that cannot be detected by the angular velocity sensor 23 is large. Therefore, even if the shake is corrected optically by the shake correction lens 20, the effect is small. For this purpose, the lens side CPU 24
Instructs the lens driving unit 200 to stop driving, power consumption can be reduced. When the photographing magnification β is equal to or more than the predetermined value, the influence of the parallel shake is large, and the shake correction effect using the conventional shake correction system using the angular velocity sensor is reduced. The body CPU 14 restores the image data output from the CCD 10 to an image without blurring because the camera is superior in terms of the blur correction effect. on the other hand,
When the photographing magnification β is smaller than the predetermined value, the body side C
It is better to drive the blur correction lens 20 to optically correct the blur than to restore the image data to an image without blur by the PU 14 for the following reasons. For this,
The lens-side CPU 24 controls driving of the lens driving unit 200. (A) Since the influence of parallel blur can be ignored, correction can be performed by a conventional blur correction system using an angular velocity sensor and a blur correction lens. A blur correction system using image data requires a processing capability of a CPU. Is done. (B) In the case where correction is performed using a blur correction lens before shooting and correction is performed using image data during shooting, a locking operation of the blur correction lens is required during shooting, which causes a time lag. (C) When performing correction using image data, it is not possible to correct a range where image data is missing (peripheral portion of the image). (D) When correction is performed using image data, the correction accuracy decreases as the blur amount increases. The parallel blur has an effect irrespective of the photographing magnification, but when the magnification is low, a wide range of images is recorded. Therefore, the influence of the blur on the image is small, but when the magnification is high, it is greatly affected by the blur. So, if you don't correct it, it will stand out. However, parallel shake cannot be detected by the shake sensor,
Since the influence is inevitably left, switching is performed according to the magnification.

The camera system according to the first embodiment of the present invention has a shake correction device only on the interchangeable lens 2 side. When the release switch 143 is in a half-pressed state (a shooting preparation state), the light that has passed through the shake correction lens 20 is reflected by the quick return mirror 120,
An image is formed on the screen 11a. For this reason, the photographer can check the image on the screen 11 a by the finder optical system 11. In this case, the lens side CP
U24 instructs the lens drive unit 200 to drive, and the blur correction lens 20 corrects the blur, so that the photographer can capture an image without blur.

On the other hand, when the release switch 143 is fully pressed (photographing state), the quick return mirror 120 is jumping up, and the subject image is
Image on 0. To do this, the photographer
The image on 1a cannot be confirmed by the finder optical system 11. The lens-side CPU 24 includes a lens driving unit 20.
0 is instructed to stop driving, and the body-side CPU 14 corrects the blur of the subject image based on the image data written in the image data memory 141 and the blur data stored in the blur data memory 140. As described above, in the camera system according to the first embodiment of the present invention, the lens driving unit 200 is driven or the body CPU
In order to reduce the power consumption by operating one of them to restore the image data.

[Second Embodiment] FIG. 4 is a diagram showing a pattern of a camera system according to a second embodiment of the present invention. The camera system shown in FIG.
The body-side CPU 14 and the lens driving unit 200 are connected without omitting U24 or via the lens-side CPU 24. The body-side CPU 14 stores the angular velocity information output by the angular velocity sensor 13 provided on the camera body 1 side and the CCD 1
The image is restored to a blur-free image on the basis of the image data output by 0.

In the camera system shown in FIG. 4B, the CCD 10 and the angular velocity sensor 13 are connected to the lens CPU without the body CPU 14 or without the intervention of the body CPU 14.
24. The lens-side CPU 24 restores an image without blur based on the angular velocity information output by the angular velocity sensor 13 and the image data output by the CCD 10.

In the camera system shown in FIG. 4C, the lens driver 200 and the angular velocity sensor 23 are connected to the body CPU 14 without the lens CPU 24 or without the lens CPU 24. Body side CPU 14
Is the angular velocity information output by the angular velocity sensor 23 and the CCD 1
The image is restored to a blur-free image on the basis of the image data output by 0.

In the camera system shown in FIG. 4D, the lens-side CPU 24 and the CCD 10 are connected without the body-side CPU 14 or through the body-side CPU 14. The lens-side CPU 24 restores an image without blur based on the angular velocity information output by the angular velocity sensor 23 and the image data output by the CCD 10. The camera system shown in FIG. 4 (D) can be equipped with an interchangeable lens for a conventional silver halide camera, and a digital still camera not equipped with a CCD drive unit or an angular velocity sensor has a lens side C.
The PU 10 can control the CCD 10.

[Other Embodiments] The present invention is not limited to the above-described embodiments, but can be variously modified and changed, and they are also within the equivalent scope of the present invention. For example, the camera system according to the first embodiment of the present invention is disclosed in
The image restoration method described in JP-A-118468 is described as an example, and the method is not limited to this as long as the image data can be restored, and another method may be used. Further, the photographing magnification β is set to 0.2 as the judgment value, but this value is not limited to 0.2 because the value is changed by the lens.

In the camera system according to the first embodiment of the present invention, the release switch 143 is pressed halfway,
Although the half-press timer is ON, the half-press timer is turned ON at the same time when the shake correction start switch 244 is turned ON.
N operations may be performed. The blur correction lens 20 may be mechanically locked by a lock mechanism, but is driven by the lens driving unit 200 such that the optical axis I of the entire photographing optical system and the center of the blur correction lens 20 coincide with each other. It may be held at that position. The camera system according to the first embodiment of the present invention includes:
Although the image data is restored by the body side CPU 14 after the mirror is lowered, the invention is not limited to this. The body-side CPU 14 can restore the image data at any time after the image data and the blur data are completed.

[0065]

As described above in detail, according to the first aspect of the present invention, the control unit controls the first position in accordance with the photographing magnification.
Actuating the first operating unit or the second operating unit for operating the second blur correcting unit, so that when the blur correction is difficult, the first or second operating unit operates. do it,
The blur correction effect can be improved.

According to the second aspect of the present invention, the control unit includes:
When the photographing magnification is equal to or more than the predetermined value, the second operating unit is operated. When the photographing magnification is smaller than the predetermined value, the first operating unit is operated. When the blur correction is possible, the first operating unit is operated. When the photographing magnification is equal to or more than the predetermined value and the blur correction is difficult, the second operating unit is operated instead of the first operating unit. Thus, the blur correction effect can be improved.

According to the third aspect of the present invention, the first blur correcting section includes a blur correcting optical system, the second blur correcting section includes an image information converting section, and the first operating section. Is provided with a drive unit for driving the shake correction optical system, and the second operating unit is provided with an image restoration unit for restoring the subject image to a blur-free image. Therefore, when the photographing magnification is smaller than a predetermined value, In addition, blur correction can be performed by a blur correction optical system, and when the shooting magnification is equal to or more than a predetermined value, the effect of parallel blur is large.

According to the fourth aspect of the present invention, the arithmetic unit comprises:
Based on the shake detection information output by the shake detection unit, shake correction information corresponding to the shake correction amount is calculated, and the control unit drives the drive unit based on the shake correction information, and calculates the shake correction information and the image information. Since the image restoration unit restores the subject image to a blur-free image based on the image restoration unit, the shake can be corrected by the shake correction optical system or the image information conversion unit.

According to the fifth aspect of the present invention, a camera body that can be mounted on an interchangeable lens including a lens-side operation unit controls a body-side operation unit that operates a body-side shake correction unit, and controls the body-side operation unit. The body-side control unit activates the body-side operation unit or instructs the interchangeable lens to operate the lens-side operation unit according to the photographing magnification. In addition, the body-side operation unit or the lens-side operation unit operates to improve the blur correction effect.

According to the sixth aspect of the present invention, the control unit includes:
When the photographing magnification is equal to or more than a predetermined value, the body-side operation unit is operated. When the photographing magnification is smaller than the predetermined value, the operation of the lens-side operation unit is instructed to the interchangeable lens side, so the photographing magnification is smaller than the predetermined value. In such a case, when the blur correction is possible, the operation of the lens-side operating unit is instructed to the interchangeable lens side, and when the photographing magnification is equal to or more than the predetermined value and the blur correction is difficult, the body-side operating unit is operated. Thus, the blur correction effect can be improved.

According to the seventh aspect of the present invention, the body-side blur correction unit includes the image information conversion unit, and the body-side operation unit includes the image restoration unit that restores the subject image to a blur-free image. When the photographing magnification is equal to or more than a predetermined value, the influence of the parallel blur is large, so that the image restoration unit can correct the blur.

According to the eighth aspect of the present invention, the arithmetic unit comprises:
Based on the shake detection information output from the shake detection unit, shake correction information corresponding to the shake correction amount is calculated, and the body-side control unit uses the shake correction information and the image information to generate a subject image by the image restoration unit. Restore a blur-free image.
According to the ninth aspect of the present invention, the calculation unit calculates shake correction information according to the shake correction amount based on the shake detection information output from the interchangeable lens, and the body-side control unit Based on the shake correction information and the image information, the image restoration unit restores the subject image to an image without blur.
Therefore, when the shooting magnification is equal to or greater than the predetermined value, the image restoration unit can correct the blur.

According to the tenth aspect of the present invention, an interchangeable lens that can be mounted on a camera body including a body-side operation unit that operates a body-side shake correction unit includes a lens-side operation unit that operates a lens-side shake correction unit. A lens-side control unit that controls the lens-side operation unit. The lens-side control unit operates the lens-side operation unit or instructs the camera body to operate the body-side operation unit in accordance with the shooting magnification. Therefore, when blur correction is difficult, the lens-side operating unit or the body-side operating unit operates to improve the blur correcting effect.

According to the eleventh aspect of the present invention, the lens-side control unit stops the lens-side operation unit when the photographing magnification is equal to or more than the predetermined value, and stops the lens-side operation unit when the photographing magnification is smaller than the predetermined value. Is operated, when the photographing magnification is equal to or more than the predetermined value and the blur correction is difficult, the lens-side operation unit is stopped to prevent power consumption. Further, when the photographing magnification is smaller than the predetermined value and the blur correction can be performed, the blur can be corrected by operating the lens-side operation unit.

According to the twelfth aspect of the invention, when the photographing magnification is equal to or more than the predetermined value, the lens-side control unit instructs the camera body to operate the body-side operation unit, and the photographing magnification is smaller than the predetermined value. Sometimes, the lens-side operating unit is operated, so when the photographing magnification is equal to or more than a predetermined value and blur correction is difficult, the lens-side operating unit is operated by operating the body-side operating unit instead of the lens-side operating unit. hand,
Power consumption can be prevented. Further, when the photographing magnification is smaller than the predetermined value and the blur correction can be performed, the blur can be corrected by operating the lens-side operation unit.

According to the thirteenth aspect of the present invention, the lens-side blur correction unit includes a blur correction optical system, and the lens-side operating unit includes the lens-side drive unit that drives the blur correction optical system. When the magnification is small, since the influence of the parallel shake is small, the shake correction optical system can be driven by the lens-side drive unit to correct the shake.

According to the fourteenth aspect of the invention, the calculating section calculates blur correction information according to the blur correction amount based on the blur detection information output from the blur detecting section, and the lens-side control section calculates the blur correction information. The lens driving unit is driven based on the shake correction information. According to the invention described in claim 15, the calculation unit calculates shake correction information according to the shake correction amount based on the shake detection information output from the camera body side,
The lens-side control section drives the lens-side drive section based on the shake correction information. Therefore, when the shooting magnification is smaller than the predetermined value, the blur can be corrected by the blur correction optical system.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a camera system according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a process of calculating a blur amount by a lens-side CPU in a camera system according to a second embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of the camera system according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a pattern of a camera system according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 camera body 2 interchangeable lens 10 CCD 11 finder optical system 13, 23 angular velocity sensor 14 body side CPU 20 blur correction lens 24 lens side CPU 200 lens drive section 230 position detection section

Claims (15)

[Claims] A first operating unit that operates the first and second shake correcting units; a second operating unit that operates the second shake correcting unit; A control unit that controls the first and second operating units, wherein the control unit operates the first or second operating unit according to a shooting magnification. system. 2. The camera system according to claim 1, wherein the control unit activates the second operating unit when the photographing magnification is equal to or more than a predetermined value, and when the photographing magnification is smaller than the predetermined value, Actuating a first actuating section, the camera system comprising: 3. The camera system according to claim 1, wherein the first shake correction unit includes a shake correction optical system that changes an optical path of a photographing optical system, and the second shake correction unit. Includes an image information conversion unit that converts a subject image into image information, the first operating unit includes a driving unit that drives the shake correction optical system, and the second operating unit includes a drive unit that blurs the subject image. A camera system, comprising: an image restoration unit for restoring an image without images. 4. The camera system according to claim 3, wherein a blur detecting unit that detects blur and outputs blur detection information, and calculates blur correction information according to a blur correction amount based on the blur detection information. The control unit drives the driving unit based on the blur correction information, and the image restoration unit does not blur the subject image based on the blur correction information and the image information. A camera system, characterized in that the image is restored. 5. A camera body mountable on an interchangeable lens including: a lens-side shake correction unit; and a lens-side operation unit that operates the lens-side shake correction unit. A body-side operation unit that operates a correction unit; and a body-side control unit that controls the body-side operation unit, wherein the body-side control unit operates the body-side operation unit or A camera body for instructing the interchangeable lens side to operate a lens side operation unit. 6. The camera body according to claim 5, wherein the control unit activates the body-side operation unit when a photographing magnification is equal to or more than a predetermined value, and the lens when the photographing magnification is smaller than a predetermined value. Directing the operation of the side operating section to the interchangeable lens side. 7. The camera body according to claim 5, wherein the body-side blur correction unit includes an image information conversion unit that converts a subject image into image information, and the body-side operation unit includes A camera body, comprising: an image restoration unit that restores an image to a blur-free image. 8. A camera body according to claim 7, wherein a shake detection unit that detects shake and outputs shake detection information, and calculates shake correction information according to a shake correction amount based on the shake detection information. A camera unit, wherein the body-side control unit causes the image restoration unit to restore the subject image to a blur-free image based on the shake correction information and the image information. 9. The camera body according to claim 7, further comprising: a calculation unit configured to calculate shake correction information according to a shake correction amount based on shake detection information output from the interchangeable lens side, The camera body, wherein the control unit causes the image restoration unit to restore the subject image to a blur-free image based on the shake correction information and the image information. 10. An interchangeable lens that can be mounted on a camera body, comprising: a body-side shake correction unit; and a body-side operation unit that operates the body-side shake correction unit. A lens-side operation unit that operates a correction unit; and a lens-side control unit that controls the lens-side operation unit. The lens-side control unit operates the lens-side operation unit according to a shooting magnification, or Instructing the camera body side to operate a body side operation unit. 11. The interchangeable lens according to claim 10, wherein the lens-side control unit stops the lens-side operation unit when the photographing magnification is equal to or more than a predetermined value, and when the photographing magnification is smaller than the predetermined value. Actuating the lens-side operating section; 12. The interchangeable lens according to claim 10, wherein when the photographing magnification is equal to or more than a predetermined value, the lens-side control unit instructs the camera body to operate the body-side operating unit. When the value is smaller than a predetermined value, the lens-side operating section is operated. 13. The interchangeable lens according to claim 10, wherein the lens-side shake correction unit includes a shake correction optical system that changes an optical path of a shooting optical system, and the lens The interchangeable lens, characterized in that the side operation unit includes a lens side drive unit that drives the shake correction optical system. 14. The interchangeable lens according to claim 13, wherein a shake detection unit that detects shake and outputs shake detection information, and calculates shake correction information according to a shake correction amount based on the shake detection information. The lens-side control unit, based on the blur correction information,
An interchangeable lens, characterized by driving the lens-side drive unit. 15. The interchangeable lens according to claim 13, further comprising: a calculation unit configured to calculate shake correction information according to a shake correction amount based on shake detection information output from the camera body. The control unit, based on the blur correction information,
An interchangeable lens, characterized by driving the lens-side drive unit.