JPH0933970A - Camera with image blurring correcting function, interchangeable lens and camera main body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always obtain an excellent image regardless of a recording system by varying the action characteristic of an image blurring correction means according to the recording system of a recording means recording an object image. SOLUTION: When a switch SW1 is turned on, information related to image size on a camera side is transmitted to a microcomputer in a lens together with an image blurring correction start command by a microcomputer in a camera. By the microcomputer in the lens, image blurring is corrected by controlling and changing the amplification factor of signals outputted by the position detection means of a shake detection sensor SA and a shake correction lens L2 or a limiter and the like regulating the correcting range of the image blurring so that the correcting action of the image blurring suitable for the image size on the camera side can be executed. In such a way, the action characteristic of the image blurring correction means is varied according to the recording system of the recording means recording the object image formed by a photographing optical system. Therefore, the correcting accuracy and the correcting range of the image blurring can be changed according to the image size and optimized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a camera with an image blur correction function, an interchangeable lens having an image blur correction means for correcting the blur generated in a photographing optical system, and a recording means for recording a subject image. It relates to the improvement of the camera body.

[0002]

2. Description of the Related Art Conventionally, various devices have been proposed for correcting image blur caused by camera shake of optical devices such as still cameras and movie cameras. In this type of device, the camera shake correction characteristic is set to the optimum characteristic according to the camera in which it is incorporated. The camera shake correction characteristics mentioned here are: camera shake correction range (camera shake correction possible angle), camera shake correction frequency band, camera shake correction accuracy, camera shake correction start / end operation, etc.

On the other hand, recently, a camera system in which the size of an image pickup surface (hereinafter, also referred to as an image size) can be switched and selected, or a camera system in which a plurality of types of cameras having different image sizes are exchanged and used is proposed and commercialized. Has been done.

The former is a camera in which a panorama mode or a trimming (instructing partial enlargement at the time of printing) mode can be selected, and a plurality of image sizes can be selected in one camera.

Regarding the latter, in a camera system in which a camera body having an image pickup section and a photographing optical system are attachable / detachable, a camera body having a silver salt film and a digital camera or a still for detecting and recording an image by an image pickup device such as CCD. A system in which both a video camera and the like are attached to the photographing optical system has been proposed or commercialized.

Further, a system or a system in which a camera or a group of cameras having different recording modes can be applied to one photographing optical system has been proposed or commercialized. Here, a camera having a recording mode refers to, for example, a camera having a still image recording mode (hereinafter referred to as a still camera), a camera having a moving image recording mode (hereinafter referred to as a movie camera), and the like.

Also in this conventional example, a camera body having both still movie modes for the photographing optical system is integrally formed, or a plurality of recording modes for one photographing optical system are provided. There has been proposed a system in which the camera body is detachable.

[0008]

However, when the image blur correction device is incorporated in the camera or camera system of the above-mentioned conventional example, the image blur correction is performed according to the image size and the recording mode, that is, according to the recording method. It is desirable to change the characteristics, but no such proposal has been made in the past.

Although Japanese Patent Laid-Open No. 4-319923 discloses that image blur correction control is performed only in the trimming mode, image blur correction is uniformly prohibited in the non-trimming mode, which is inconvenient for the photographer. there were.

(Object of the Invention) A first object of the present invention is to provide a camera with an image blur correction function which can always obtain a good image regardless of the recording system for recording a subject image. Is.

A second object of the present invention is to provide a camera with an image blur correction function that can obtain necessary and sufficient image blur correction accuracy regardless of the recording method for recording a subject image. is there.

A third object of the present invention is to provide a camera with an image blur correction function which can set an image blur correction range optimum for the recording system at that time regardless of the recording system for recording a subject image. It is to be.

A fourth object of the present invention is to provide an image blur correction function with an image blur correction frequency which is optimum for the storage system at that time and which can perform image blur correction with less discomfort for camera operations such as panning. It is to provide a camera.

A fifth object of the present invention is that, if the recording system at that time has a large effect of performing image blur correction, image blur correction is performed, and the adverse effect of performing image blur correction is large. If there is, it is to provide a camera with an image blur correction function that can stop the image blur correction and always obtain a good image.

A sixth object of the present invention is to provide an image blur correction function capable of reducing the uncomfortable feeling at the start of the image blur correction by making the image blur correction start quickly or slowly depending on the storage system at that time. It is to provide an attached camera.

A seventh object of the present invention is to provide an image blur correction function capable of reducing the uncomfortable feeling at the end of image blur correction by making the image blur correction end quickly or smoothly depending on the storage system at that time. It is to provide an attached camera.

An eighth object of the present invention is to provide a camera with an image blur correction function capable of performing an image blur correction operation according to recording at that time.

A ninth object of the present invention is to provide an interchangeable lens which can always give a good image regardless of which recording system the camera body is attached to.

A tenth object of the present invention is to provide an interchangeable lens and a camera body which can set an image blur correction range optimum for the recording system at any time, regardless of which recording system is mounted on the camera body. It is to be.

An eleventh object of the present invention is to set an optimum image blur correction frequency for a storage system at any time, regardless of which recording system is mounted, and to make a camera operation such as panning feel uncomfortable. It is an object of the present invention to provide an interchangeable lens and a camera body capable of performing image blur correction with less blur.

A twelfth object of the present invention is to perform image blur correction if the recording system of the mounted camera body has a great effect of performing image blur correction, and to perform image blur correction. It is an object of the present invention to provide an interchangeable lens and a camera body capable of stopping image blur correction and always providing a good image if the adverse effect is great.

A thirteenth object of the present invention is to reduce the uncomfortable feeling at the start of image blur correction by making the image blur correction start quickly or slowly depending on the storage system of the mounted camera body. It is to provide an interchangeable lens and a camera body that can be used.

A fourteenth object of the present invention is to reduce the uncomfortable feeling at the end of image blur correction by making the image blur correction end quickly or slowly depending on the storage system of the mounted camera body. It is to provide an interchangeable lens and a camera body that can be used.

A fifteenth object of the present invention is to provide a camera body capable of always producing a good image regardless of the recording system for recording a subject image.

[0025]

In order to achieve the first object, the present invention according to claim 1 provides a recording means for recording a subject image formed by a photographing optical system according to a recording system. The operation characteristic of the image blur correction unit is made variable.

In order to achieve the first object, the present invention according to claim 2 is to provide an image pickup optical system for forming a subject image, and an image shake correction means for correcting shake generated in the image pickup optical system. A recording unit that records the subject image and a characteristic changing unit that changes the operation characteristic of the image blur correction unit according to the recording system of the recording unit are provided, and the image blur correction is performed according to the recording system of the recording unit. The operating characteristics of the means are made variable.

In order to achieve the second object, the present invention according to claim 3 changes the image blur correction accuracy of the image blur correction means according to the recording method of the recording means.

In order to achieve the third object, the present invention according to claim 4 is such that the image blur correction range of the image blur correction means is varied according to the recording system of the recording means.

In order to achieve the fourth object, according to the present invention of claim 5, the image blur correction frequency characteristic of the image blur correction means is varied according to the recording system of the recording means.

In order to achieve the fifth object, the present invention according to claim 6 selects whether to permit or prohibit the image blur correction by the image blur correction means according to the recording method of the recording means. There is.

In order to achieve the sixth object, the present invention according to claim 7 varies the start operation of the image blur correction by the image blur correction means according to the recording system of the recording means. .

In order to achieve the seventh object, according to the present invention of claim 8, the operation end of the image blur correction by the image blur correction means is varied according to the recording system of the recording means. .

In order to achieve the eighth object, the present invention according to claim 9 makes it possible for the recording means to switch the size of the imaging surface between at least the first size and the second size.
The operation characteristic of the image blur correction unit is changed according to the size of recording.

Also in order to achieve the above eighth object,
According to the tenth aspect of the present invention, it is provided with a unit for recording a still image and a unit for recording a moving image, and the operation characteristic of the image blur correction unit is changed according to the recording unit selected.

In order to achieve the ninth object, the present invention according to claim 11 is a photographic optical system for forming a subject image, and image blur correction means for compensating for the blur generated in the photographic optical system. A recording means of the recording means provided in the camera body to be mounted, and a characteristic varying means for varying the operation characteristic of the image shake correcting means in accordance with the detection method, and according to the recording scheme of the recording means, The operation characteristic of the image blur correction unit is made variable.

In order to achieve the tenth object, the present invention according to claims 12 and 18 to 21, 23, and 24 is an image blur correction according to a recording system of a recording means in a mounted camera body. The image blur correction accuracy of the means is variable.

In order to achieve the eleventh object, the present invention according to claims 13 and 18 to 21, 23, and 24 is an image blur correction according to a recording system of a recording means in a mounted camera body. The image blur correction range of the means is variable.

In order to achieve the twelfth object, the present invention according to claims 15 and 18 to 21, 23, and 24 is an image blur correction according to a recording system of a recording means in a mounted camera body. The permission / prohibition of image blur correction by means is selected.

In order to achieve the above thirteenth object, the present invention according to claims 16 and 18 to 21, 23, and 24 is an image blur correction according to a recording system of a recording means in a mounted camera body. The starting operation of the image blur correction by the means is variable.

In order to achieve the fourteenth object, the present invention according to claims 17 and 18 to 21, 23, and 24 is an image blur correction according to a recording system of a recording means in a mounted camera body. The ending operation of the image blur correction by the means is made variable.

In order to achieve the fifteenth object, the present invention according to claim 22 comprises a recording means having a plurality of recording systems and an image blur correcting means for compensating for the blur generated in the photographing optical system. When an interchangeable lens is attached, the image shake correction means is provided with characteristic changing means for changing the operation characteristics of the image shake correction means according to the recording method of the recording means, and the image shake correction means according to the recording method of the recording means. The operating characteristics of are changed.

[0042]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the illustrated embodiments.

2 and 3 are diagrams for explaining the principle of image blur correction according to the image blur correction system of the present embodiment.

FIG. 2 shows an example of an image forming optical system used in each of the embodiments of the present invention. The focal length is 35 mm.
It is a 3 × zoom of up to 105 mm, and the upper part of the figure shows the lens arrangement at the wide end (f = 35 mm) and the lower part at the tele end (f = 105 mm).

This image-forming optical system comprises four groups, the fourth group is fixed during zooming, the first, second and third groups move, and the first group is moved during focus adjustment. Moving. Then, by displacing the second group in the direction perpendicular to the optical axis, the image on the image plane is displaced to correct the image blur.

Next, the principle of image blur correction will be described.

The focal length of the imaging optical system is f, and the photographing magnification is β
Then, the imaging optical system is θ [rad] centered on the front principal point.
The image displacement amount d _IM1 when the angular shake occurs is d _IM1 = f (1 + β) · θ. On the other hand, if the ratio of the image displacement amount d _IM2 to the displacement amount d _L of the second group of the optical system of FIG. 2 is called the eccentricity sensitivity S _d , then d _IM2 = S _d · d _L. . Since the eccentricity sensitivity S _d is a function of the focal length f and the imaging magnification β, it can be expressed as S _d = S _d (f, β). Then, the principle of image blur correction is to eliminate the image blur (equation) due to the angular shake of the imaging optical system by the image displacement (equation) due to the lens displacement. Therefore, using = and the equation, d _L = ( d _IM1 / S _d ) = {f · (1 + β) · θ} / {S _d (f, β)} ...... The image blur correction lens may be driven according to d _L calculated in. FIG. 3 is a block diagram showing this image blur correction action.

The camera shake θ [rad] generated in the camera is detected by the shake detection sensor SA having the sensitivity A ₁ [V / rad], and the detected shake signal V ₁ [V] is output. Since the signal is weak, an amplification amplifier AMP having an amplification factor A ₂
It is amplified by ₂ and outputs a signal V ₂ [V].

The variable amplifier AMP3 is used for f, f of the imaging optical system.
An amplifier that corrects the image blur correction characteristics due to β
₃ is expressed by the formula as follows: A ₃ = a ₃ [{f · (1 + β)} / {Sd (f, β)}] .... a ₃ is a predetermined coefficient determined by the lens. Then, the output signal V ₃ from the variable amplifier AMP3
[V] corresponds to the control command value d of the image blur correction lens displacement d expressed by the equation. The signal V ₃ is input to the adder ADD in the positive phase and then input to the phase compensation circuit COMP. The phase compensation circuit COMP is for giving an appropriate feedback gain to the image blur correction mechanism and for stabilizing the loop.

The output V _ACT from the phase compensation circuit COMP is the drive voltage V to the actuator of the image blur correction mechanism ISM.
_ACT [V] is output.

G _M is a transfer function of the system from the actuator in the image blur correction mechanism ISM to the image blur correction lens. By driving and controlling the mechanism, the image blur correction lens causes a displacement d _L [mm]. The lens displacement d _L is a lens displacement detector DETD having a sensitivity A _L [V / mm]
The detection signal is output as the output V _L. Then, the output V _L is amplified by the amplification amplifier AMP4, and its output signal V ₄ is inverted and input to the adder ADD.

With the above loop, a feedback loop is formed in which the displacement d _L of the image blur correction lens accurately follows the command value d.

The above-described block for controlling the image blur correction lens from the camera shake detection is the portion surrounded by the broken line B ₁ in FIG.

As a result of the image blur correction operation by the block B _{1, the} optical image movement d _IM2 by the block B ₂ occurs.

On the other hand, image blur caused by camera shake is caused by block B.
_It is represented as an image blur amount d _IM1 due to ₃ . Therefore, the final image blur suppression effect is expressed as d _IM3 = d _IM1 −d _{IM2 at the} addition point P, and the smaller d _IM3 is, the better the image blur correction device is.

Next, a method of setting the electric gain of the image blur correction unit will be described.

The image blur correction capability is represented by (1) blur correction resolution (high accuracy), (2) blur correction range (wide range), (3) blur correction frequency characteristic (wide band), etc. (2) is a contradictory characteristic, and the balance between the two is optimized in accordance with the characteristic peculiar to the image blur correction device, particularly the optical specifications of the photographing system. For example, in order to increase the shake correction resolution, it is necessary to increase the amplification factors of the amplification amplifier AMP2 for the shake detection sensor SA and the amplification amplifier AMP4 for the lens position detector EDTD. Then, signal saturation easily occurs with respect to a large camera shake.

Therefore, conventionally, in the image shake correction device for the telephoto zoom lens, the resolution-oriented setting is performed. In the image shake correction device for the wide-angle zoom lens, the correction range-oriented setting is performed. The constant was set according to the characteristics.

However, in such an image blur correction device, if the image size of the image pickup section is different, the following problems occur.

The optical system shown in FIG. 2 has "f = 35-105".
mm ", the image pickup unit is 24 mm long and 36 mm wide.
In the case of a 35 silver salt format camera (hereinafter referred to as a silver salt camera), this lens is a standard zoom lens. However, a camera provided with a CCD having a light receiving surface of 6 mm in length and 9 mm in width (hereinafter, referred to as a digital camera) has a telescopic zoom lens of “f = 140 to 420 mm” in appearance. Therefore, the image blur correction control with higher resolution is required when the digital camera is attached than when the silver halide camera is attached.

Further, in the movie camera, only the image blur due to the camera shake needs to be corrected, but in the still camera, particularly in the single-lens reflex camera having the quick return mirror and the focal plane shutter, the camera shake due to the mechanism also needs to be corrected.

FIG. 1 shows an optional camera body C which is composed of a plurality of camera bodies and an interchangeable lens having an image blur correction device.
It is a figure which concerns on the 1st Example of this invention which shows the camera system which consists of a combination of MR1 and interchangeable lens LNS1.
Then, in FIG. 1, elements represented by the same reference numerals as those in FIG. 3 are elements having the same operation.

The camera body CMR1 has an image recording unit IM1 including a photographing element such as a silver salt film or CCD, and a camera microcomputer CCPU1 for controlling exposure of the camera, film feeding and the like.

The switches SW1 and SW2 are switches that are turned on by the first and second strokes of a release button (not shown), and are switches that trigger image blur correction start and exposure control. SWMN is a power switch of the camera.

BAT is a power supply including a DC / DC converter and supplies a power supply of the reference potential V _cc to the circuits and actuators in the camera body CMR1 and interchangeable lens LNS1.

Next, the interchangeable lens LNS1 will be described.

The optical system of the interchangeable lens LNS1 is composed of four lens groups L1 to L4 corresponding to the four groups shown in FIG. 2, and L1, L2, and L3 advance and retreat in the optical axis direction in a predetermined relationship to perform zooming. Focusing is performed by advancing and retracting L1.

ENCZ and ENCB are encoders for detecting the zoom position and the focus position, respectively, and are usually composed of a gray code pattern and a detection brush.

The second lens unit L2 is an image blur correction lens, is supported so as to be drivable in a two-dimensional direction in a plane perpendicular to the optical axis, and is shift-driven by an image blur correction actuator IACT. DETD is a displacement detector that detects the displacement amount d _L of the shake correction lens L2, and its output V _L is input to the amplification amplifier AMP4. The amplification amplifier AMP4 has been described as having a predetermined amplification factor A ₄ in FIG. 3, but in this figure, the lens microcomputer LCP described later is used.
It is a variable gain amplifier whose amplification factor changes in response to a control signal CSL from U.

MLACT is a mechanical lock actuator that drives a mechanical lock mechanism for fixing the shake correction lens L2 to the origin (center of the drivable range) when image shake correction is not in operation.

Reference numeral SA denotes a shake detection sensor such as an angular displacement meter, which outputs the shake shake angular displacement θ as a potential signal V ₁ which is input to the amplification amplifier AMP2. The amplification amplifier AMP
2 also has a predetermined amplification factor A ₂ in FIG. 3, but in this figure, the microcomputer LCPU1 in the lens
Is a variable gain amplifier whose amplification factor changes with a control signal CSA from

The LCPU1 is a lens microcomputer for performing image blur correction control, and the in-lens microcomputer LCPU1 is an analog output signal V of the amplifiers AMP2 and AMP4.
_2, V ₄ is converted A / D A / D converter ADC1,
It has ADC2. Then, the computing unit CAL calculates a lens control signal based on these digitized signals, converts the signal into an analog signal by the D / A converter DAC, and outputs the signal to the image blur correction actuator IACT. That is, the calculation performed in the lens microcomputer LCPU is performed in the portion corresponding to the block D ₁ surrounded by the chain double-dashed line in FIG.

On the other hand, the camera CMR1 and the lens LNS1 have two sets of signal lines DCL and DL in the engagement mount portion.
C and a pair of power supply line V _CC and ground line GND
It is electrically connected with. The line DCL is a line for transmitting command data and the like from the camera body to the interchangeable lens,
The line DLC is a line for transmitting command data and the like from the interchangeable lens to the camera body. In addition, the microcomputer LC in the lens of the interchangeable lens from the camera body through the line V _CC
Power is supplied to PU1 and the actuator IACT.

When the photographer operates the switches SWMN, SW1 and SW2 of the camera CMR1, the two microcomputers CCPU1 and LCPU1 communicate with each other and LC
Image blur correction control is executed according to the control flow stored in PU1.

4 and 5 are flow charts showing the control of each microcomputer in the camera body and the interchangeable lens in the first embodiment of the present invention.

First, referring to FIG. 4, the microcomputer CCP in the camera
A flow chart of control of U1 will be described.

Power switch SWM on the CMR side of the camera body
When N is turned on, power supply to the microcomputer CCPU1 in the camera is started, and after step (101), step (1)
The operation from 02) is started.

In step (102), the switch SW1 is turned on by pressing the release button in the first step.
When the switch SW1 is off, the process proceeds to step (103). Then, in this step (103), the image blur correction operation toward the interchangeable lens LNS side [hereinafter, IS (Image Stabilize at
(abbreviation of ion)] is transmitted.

The steps (102) to (103) are repeatedly executed until the switch SW1 is turned on or the power switch is turned off.

When the switch SW1 is turned on, the process shifts from step (102) to (111).

In step (111), the in-camera microcomputer CCPU1 sends an image blur correction start command to the in-lens microcomputer LCPU1 via the line DCL. In the next step (112), data regarding the image size of the camera is transmitted in the same manner. Then, the process proceeds to step (113), the state of the switch SW1 is detected, and if it is off, the process returns to step (102) to enter the standby state.

On the other hand, if the switch SW1 is on, the process proceeds from step (113) to step (114), this time the state of the switch SW2 is detected, and if it is on, the process proceeds to step (115) to control the exposure of the film, In the following step (116), film winding is performed. If the switch SW2 is off, the process returns to step (113).

FIG. 5 is a flow chart showing the control of the microcomputer LCPU1 in the lens.

In FIG. 5, the power switch S on the camera side
When the power is also supplied to the interchangeable lens side by turning on the WMN, the process proceeds from step (131) to step (132).

At step (132), the IS start command is discriminated. When the IS start command is not received from the camera body CMR, the process proceeds to step (133). And
In this step (133), the shake correction lens L2
Performs a centering operation that is a preparatory operation for locking the to the origin. Here, the image blur correction actuator I
The ACT is driven to electrically control the shake correction lens L2 at the origin, that is, the center position.

In the next step (134), the mechanical lock mechanism is operated in the lock direction, and the shake correction lens L
Mechanically fix 2 to the origin position. As the mechanical lock mechanism, the mechanism disclosed in Japanese Patent Laid-Open No. 4-110835 by the present applicant may be used.

In the next step (135), the image blur correction actuator IACT is stopped. In addition,
If the image blur correction operation has already stopped, the operations of steps (133) to (135) are ignored. Then, during execution of the following step (132) to step (135), the camera microcomputer CCPU1
When the IS start command is received, the process proceeds from step (132) to step (141).

In step (141), data relating to the image size from the camera body corresponding to step (112) in FIG. 4 is received. Then, in step (142), the amplification factors A ₂ and A ₄ of the amplifiers AMP2 and AMP4 shown in FIG. 1 according to the image size data.
A command signal for setting is output from the lines CSA and CSL.

In the following step (143), a limiter or the like for defining the image blur correction limit is set. As described above, the operation of changing the amplification factor of the signal for the shake correction control shifts the dynamic range of the signal. As a result, the maximum image blur correction range or the like for control changes, so it is necessary to change the correction limit limiter and other control parameters.

In the next step (144), the zoom encoder ENCZ and the focus encoder ENCB
By further detecting the zoom zone Z and the focus zone B, in the subsequent step (145), the microcomputer LC in the lens is detected.
The lens data is continuously extracted from the ROM table of PU1. The in-lens microcomputer LCPU1 sets the image blur correction characteristic value A ₃ represented by the above equation to R corresponding to each zone Z, B.
It is stored as an OM table value. Therefore, the data corresponding to the zones Z and B detected in the above step (144) is read.

In the next step (146), a centering operation, which is a preparatory operation before the mechanical lock of the shake correction lens L2 is released, is performed. This is to reduce the load due to friction during the mechanical lock releasing operation in the next step and to prevent the correction lens from dropping due to gravity after the lock is released.

In the following step (147), the mechanical lock mechanism is released. Then, the step (148)
In step 1, the image blur correction actuator IACT is driven and controlled in accordance with the signal V _ACT shown in FIG. 1 or FIG. 3 to perform image blur correction. Then, in step (149), it is determined whether or not an IS stop command has come from the camera body,
If so, the process proceeds to step (132) to stop the image blur correction, and if not, the process returns to step (148) to continue the image blur correction.

When the switch SW1 is turned on, the microcomputer in the camera transmits the image blur correction start command and the information on the image size on the camera side to each other when the flow of FIGS. 4 and 5 is summarized. . Then, the microcomputer in the lens can perform image blur correction suitable for the image size on the camera side, such as a limiter that regulates the output signal amplification factor of the shake detection sensor SA or the position detection means of the blur correction lens L2 and the image blur correction range. Control and change,
Image blur correction is performed.

According to the first embodiment, 1) the image blur correction precision can be changed according to the image size.

2) The image blur correction range can be changed according to the image size.

3) The accuracy and range of image blur correction according to the image size can be optimized. This has the effect.

(Second Embodiment) FIG. 6 is a block diagram showing a camera according to a second embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. .

In FIG. 6, the points different from the first embodiment are as follows: (1) It is assumed that the camera body CMR2 and the lens unit LNS2 are integrated.

(2) The camera body CMR2 has image size switching means.

(3) The frequency characteristic of image blur correction can be changed. That is the point.

First, the camera body CMR2 will be described.

The camera body CMR2 includes an image recording unit IM2 made of a silver salt film or an image pickup device and a recording unit I.
It has a switching means AP for switching the image size of M2. For example, when the image recording unit IM2 is a silver salt film, it is composed of an aperture size switching mask placed immediately before it. On the other hand, when the image recording unit IM2 is an image sensor, the switching means AP has a function called a video signal trimming circuit provided in a circuit for processing a video signal from the image sensor, a so-called electronic zoom. Corresponds to the circuit section.

Then, the in-camera microcomputer CCPU2 sends a signal according to the state of the image size switching means AP to the in-lens microcomputer LCPU2 described later.

The configuration other than the above is the same as that of the first embodiment.

Next, the lens unit LNS2 will be described.

Hand shake signal V ₁ from shake detection sensor SA
Is input to the band variable filter FLT, and its output signal V
_F is the AD converter ADC1 of the microcomputer LCPU2 in the lens
Is input to Here, in the filter FLT, as shown in FIG. 7, the cutoff frequency f _L on the low frequency side or the cutoff frequency f _H on the high frequency side can be switched to f _L 'and f _H ', respectively. It is a thing. This characteristic switching is performed by controlling the control signal CS from the microcomputer LCPU2 in the lens.
Controlled by F. The filter FLT may be configured as a digital filter in the lens microcomputer, as a matter of course.

The structure of the lens unit LNS2 other than the above is the same as that of the first embodiment, and the description thereof will be omitted.

Then, the in-camera microcomputer CCPU2 and the in-lens microcomputer LCPU2 are the same as in the first embodiment.
Communication is performed via the lines DCL and DCL.

Next, a control flow of the camera according to the second embodiment will be described. In addition, microcomputer CCP in camera
Since the flow of U2 is the same as the flow of the first embodiment of FIG. 4, its description is omitted.

FIG. 8 is a control flow of the in-lens microcomputer LCPU2 according to the second embodiment.

This flow corresponds to steps (142) and (143) of step (242) of the flow of the in-lens microcomputer LCPU1 of the first embodiment shown in FIG.
The only difference is that it is replaced by (243), and the other steps are the same. Therefore, only the changed portion will be described.

When the IS start command is transmitted from the microcomputer CCPU2 in the camera, the process proceeds from step (232) to step (241).

In step (241), the image size data is received from the camera microcomputer CCPU2. Then, in the next step (242), based on the received data, the filter FLT of FIG.
Set the cutoff frequency of.

For example, when the image size is small, in FIG. 7, the cutoff frequencies are set to f _L 'and f _H ' to widen the shake detection band. The reason for this is that if the image size is small, the imaging angle of view is small, and the lens becomes a relatively telephoto system, so that precise image blur correction control in a wider band is required. Also, when using a telephoto lens, sudden happening operations and framing changing operations are reduced, so the uncomfortable feeling (what is referred to as swinging back) that occurs when the image blur correction characteristics are extended to the low frequency side is not noticeable. .

In the next step (243), the image blur correction limiter is set. For example, when the image size is small, the limiter value is increased. This is for the following reason.

When the correction optical system is displaced for image blur correction, aberrations are generally conspicuous from the periphery of the screen, that is, the area where the image height is large. Therefore, the smaller the actual image size with respect to the image circle of the photographing lens, the less noticeable the image deterioration is, even if the shake correction optical system is largely displaced.

Subsequently, in steps (244) to (247), lens data reading, centering, and mechanical lock releasing operations are performed as in the first embodiment. In the following step (248), image blur correction driving is performed based on the characteristics set in the above steps (242) and (243).

According to the second embodiment, when the image size of the camera changes, 1) image blur correction control having optimum frequency characteristics for the image size can be performed.

2) The optimum image blur correction range can be set for the image size. This has the effect.

(Third Embodiment) In a third embodiment shown below, permission / prohibition of image blur correction control and correction start timing control are performed according to the image size.

FIG. 9 is a block diagram showing a camera system according to the third embodiment of the present invention, which is a camera body CMR3.
And an interchangeable lens LNS3. The camera body CMR3 is different from the camera body CMR1 of the first embodiment in that a warning indicator DISP is added. On the other hand, the configuration of the interchangeable lens LNS3 is the same as that of the first embodiment. Same as LNS1, but different in control flow.

FIG. 10 is a control flow of the in-camera microcomputer CCPU3 according to the third embodiment.

Power switch SW on the camera body CMR3 side
When the MN is turned on, power supply to the in-camera microcomputer CCPU3 is started, and the operation from step (302) is started via step (301).

At step (302), the switch SW1 is turned on by pressing the release button in the first stage.
Is detected, and when the switch SW1 is off, the process proceeds to step (303). And this step (3
In 03), the IS stop command is transmitted to the lens LNS side.

The steps (302) to (303) are
The process is repeated until the switch SW1 is turned on or the power switch is turned off.

When the switch SW1 is turned on, the process proceeds from step (302) to step (311).

At step (311), the in-camera microcomputer CCPU3 sends an IS start command to the in-lens microcomputer LCPU3 via the line DCL. Then, in step (312), data regarding the image size of the camera is transmitted.

In the next step (313), it is determined whether or not IS-prohibited communication described later has come from the interchangeable lens LNS3. This communication is transmitted when it is determined that the interchangeable lens LNS3 should prohibit the image blur correction. If it is determined in this step that the IS prohibited communication has come, the process proceeds to step (314), and if not, the process proceeds to step (315).

At step (314), the warning indicator DISP is turned on to inform that the image blur correction is prohibited. Then, in step (315), the state of the switch SW1 is detected.
Return to 2).

If the switch SW1 remains on, the process proceeds to step (316), where the switch SW1 is turned on.
If the state is ON, the process proceeds to step (317), and if it is OFF, the process returns to step (315).

At the next step (317), since the switch SW2 is on, the microcomputer LCPU in the lens is
SW2 ON communication indicating that the switch SW2 has been turned ON is performed. Then, in step (318), exposure control of the film or the like is performed, in next step (319), film winding is performed, and the process returns to step (315). If the switch SW1 is off in step (315), the process returns to step (302), and IS stop control is performed in the next step (303).

FIG. 11 is a flow chart showing the control of the microcomputer LCPU3 in the lens.

In FIG. 11, when power is supplied to the interchangeable lens side by turning on the power switch SWMN on the camera side, the process proceeds from step (331) to step (332).

At step (332), the IS start command is discriminated, and when the IS start command is not received from the camera body CMR3, the process proceeds to step (333). Then, in this step (333), a centering operation, which is a preparatory operation for locking the shake correction lens L2 at the origin, is performed.

In the next step (334), the mechanical lock mechanism is operated in the lock direction, and the shake correction lens L
Mechanically fix 2 to the origin position. Then, in step (335), the image blur correction actuator IA
Stop CT. If the image blur correction operation has already stopped, the operations of steps (333) to (335) are ignored.

Steps (332) to (33)
During execution of 5), IS from the microcomputer CCPU3 in the camera
When the start command is received, the process moves from step (332) to step (341).

In step (341), data concerning the image size from the camera body corresponding to step (312) in FIG. 10 is received. Then, in the next step (342), according to the image size data, the amplification factors A ₂ and A ₂ of the amplifiers AMP2 and AMP4 of FIG.
Command signals for setting A ₄ are sent to the lines CSA and CSL.
Output more.

At step (343), a limiter for defining the image blur correction limit is set. Then, in step (344), the zoom encoder ENCZ
From the focus encoder ENCB, the zoom zone Z,
The focus zone B is detected. Subsequent steps (34
In 5), the ROM of the microcomputer LCPU3 in the lens
Read lens data from the table. The in-lens microcomputer LCPU1 uses the image blur correction characteristic value A represented by the above equation.
₃ is stored as a ROM table value corresponding to each zone Z, B. Therefore, the data corresponding to the zones Z and B detected in the above step (344) is read.

In the next step (346), the size of the image size is determined and classified based on the image size received in the above step (341), that is, the diagonal dimension of the image pickup surface. Here, the image size is L (L
)), M (Middle), and S (Small). If it is determined that the image size is "S" in this step (346), the process proceeds to step (361).

At step (361), the IS prohibition signal is transmitted to the camera, and thereafter, the image blur correction is not performed, and the process returns to step (332).

This is because the control resolution of the image blur correction control becomes relatively coarse when the image size is extremely small.
As a result, the image blur correction effect becomes insufficient, so it is better to prohibit the image blur correction.

When the camera receives the IS-prohibited communication, the process proceeds from step (313) to step (314) in FIG. 10 described above, and the warning indicator DISP is blinked to confirm that the image blur correction is prohibited. Notify the photographer.

If it is determined in step (346) that the image size is "L" or "M", the process proceeds to step (347).

In step (347), a centering operation, which is a preparatory operation before the mechanical lock of the shake correction lens L2 is released, is performed. Then, in step (348), the mechanical lock mechanism is released.

In the next step (349), the image size is judged again. When it is determined that the image size is “M”, the process proceeds to step (351) where the image blur correction actuator is drive-controlled according to the signal V _{ACT in} FIG. 9 to perform the image blur correction.

On the other hand, when the image size is determined to be "L" in the step (349), the process proceeds to step (350), in which SW2 ON communication, that is, release (exposure operation) start communication is received from the camera body. Is determined. If the communication does not come, step (35)
When the communication comes, the process proceeds to step (351) to start the image blur correction control.

That is, when the image size is large, the image blur correction is started immediately before the start of exposure. This is because when the image size is large, the influence of the aberration of the peripheral portion of the image due to the displacement of the image blur correction lens L2 becomes large, so by synchronizing the exposure start and the image blur correction start, the image blur correction lens L2 during exposure is synchronized. This is to reduce the deviation from the origin of.

At the next step (352), it is judged whether or not an IS stop command has come from the camera body, and if so, the process proceeds to step (332) to stop the image blur correction, and then come. If so, the process returns to step (351) to continue the image blur correction.

When the switches SW1 are turned on, the microcomputer in the camera sends the image blur correction start command and the information about the image size of the camera to each other when the flow of FIGS. 10 and 11 is summarized. Then, the microcomputer in the lens operates differently depending on the size of the image size on the camera side. That is, when the image size is “S (small)”, image blur correction is prohibited.
When the image size is "M (medium)", image blur correction is continuously performed. When the image size is "L (large)", image blur correction is performed only when the film is exposed.

According to the third embodiment, 1) Since image blur correction permission / prohibition is controlled according to the image size, it is possible to prevent harm from occurring due to the image blur correction operation.

2) Since the start timing of image blur correction is controlled according to the image size, it is possible to achieve both the image blur correction effect and the aberration prevention. There is such an effect.

(Fourth Embodiment) In a fourth embodiment described below, a still image recording camera (still camera) and a moving image recording camera (movie camera) are used for an interchangeable lens having an image blur correction device. 2) is an embodiment in which two types of cameras can be mounted.

FIG. 12 is a block diagram showing a camera system according to the fourth embodiment of the present invention, which is an interchangeable lens LNS.
For 4, still or movie camera body CMR
4 is a wearable system.

Since the lens LNS4 has the same structure as the interchangeable lens LNS1 of the first embodiment shown in FIG. 1, its explanation is omitted. The camera body CMR4 shows an example of a movie camera in this figure. The camera CMR4 has a C
The image pickup device IM4 such as a CD is provided, and the moving image captured by the image pickup device is recorded in the record unit REC having a magnetic tape or the like. FND is a viewfinder composed of a liquid crystal display or the like.

The switch SW1 is a standby switch,
When the switch is turned on, a monitor image is displayed on the viewfinder FDR. The switch SW2 is a recording start switch, and when the switch is turned on, the record unit REC starts recording an image. Other configurations are the same as those of the camera CMR1 of FIG.
Is the same as

FIGS. 13 and 14 are flow charts showing the control of each microcomputer in the camera body and the interchangeable lens of the fourth embodiment of the present invention.

First, referring to FIG. 13, the microcomputer CC in the camera
A control flowchart of the PU 4 will be described.

Power switch SWM on the camera body CMR side
When N is turned on, power supply to the microcomputer CCPU4 in the camera is started, and after step (401), step (4)
The operation from 02) is started.

At step (402), the state of the switch SW1 interlocked with the recording preparation button is detected, and when the switch SW1 is off, the process proceeds to step (403). Then, in this step (403), a command to stop the image blur correction operation (IS) is transmitted to the interchangeable lens LNS side.

In the next step (404), the viewfinder FND is turned off, and the following step (405)
At, the recording operation of the recorder unit REC is stopped.

The above steps (403) to (4)
Each step of 05) is ignored if the corresponding operation has already stopped.

The above steps (402) to (405)
The process is repeated until the switch SW1 is turned on or the power switch is turned off.

When the switch SW1 is turned on, the process proceeds from step (402) to (411).

In step (411), the in-camera microcomputer CCPU4 sends an IS start command to the in-lens microcomputer LCPU4 via the line DCL. Then, in step (412), whether the recording mode of the camera is still or movie is determined by the in-lens microcomputer LCPU4.
Send to In this embodiment, the camera body C
Since MR4 is a movie camera, it sends a signal indicating that it is a movie.

In the next step (413), the state of the switch SW1 is detected.
It returns to 2) and becomes a standby state.

On the other hand, if the switch SW1 is turned on, the process proceeds to step (414) to put the viewfinder FND into the operating state. Then, in step (415), the state of the switch SW2 interlocked with the recording start button is detected,
If it is on, recording is started in step (416). If the switch SW2 is off, recording is stopped in step (417).

After the execution of the steps (416) and (417), the process returns to the step (413) and the above operation is repeated.

FIG. 14 is a flow chart showing the control of the microcomputer LCPU4 in the lens.

In FIG. 14, when the power switch SWMN on the camera body side is turned on, power is also supplied to the interchangeable lens side, and the process proceeds from step (431) to (432).

In step (432), the IS start command is discriminated, and when the IS start command is not received from the camera body CMR, the process proceeds to step (433). And
In this step (433), the shake correction lens L2
Performs a centering operation that is a preparatory operation for locking the to the origin. However, in this embodiment, the first
Or, instead of the abrupt centering as in the third embodiment, the gain of the variable amplifier AMP3 in FIG. 3 is gradually reduced to gently perform the centering. Details will be described later.

In the next step (434), the mechanical lock mechanism is operated in the lock direction to move the shake correction lens L.
Mechanically fix 2 to the origin position. Then, in step (435), the image blur correction actuator IA
Stop CT.

If the image blur correction operation has already stopped, the operations of steps (433) to (435) are ignored.

Steps (432) to (435)
When the IS start command is received from the microcomputer CCPU4 in the camera during execution of step, step (432) to (441)
Move to.

At step (441), a signal indicating the recording mode corresponding to step (412) of FIG. 13, that is, still or movie is received.
Then, in step (442), the cutoff frequency of the filter FLT of FIG. 12 is set based on the reception mode.

FIG. 15 is a diagram showing the frequency characteristic of the filter FLT. The characteristic in the movie mode is shown by a solid line, and the characteristic in the still mode is shown by a broken line.

When using the movie camera, there are few sudden panning operations, so the cutoff frequency in the low range is extended to f _LM in the lower range. Further, the high-frequency cutoff frequency is set to f _HM that covers the camera shake frequency band.

On the other hand, when the still camera is used, rapid panning or framing change operation is frequently performed, so that f _LS higher than the cutoff frequency f _LM in the movie mode is set in the low range.

[0178] Further, a still camera at high frequency, especially in the focal-plane shutter type single-lens reflex camera, since the quick frequency of camera shake by the running of the return mirror and a shutter blade occurs, the cut-off frequency f _HS of the high frequency movies Set higher than the value f _HM when in use,
The camera shake can be accurately corrected.

Returning to FIG. 14, in step (443), a limiter or the like for defining the image blur correction limit is set. Then, in step (444), the zoom zone Z and the focus zone B are detected by the zoom encoder ENCZ and the focus encoder ENCB.

In the next step (445), the lens data is read from the ROM table of the microcomputer LCPU1 in the lens. The in-lens microcomputer LCPU1 stores the image blur correction characteristic value A ₃ represented by the above equation as a ROM table value corresponding to each zone Z, B. Therefore, the data corresponding to the zones Z and B detected in the above step (444) is read.

In the following step (446), the speed of the centering operation, which is a preparatory operation before the mechanical lock of the shake correction lens L2 is released, is set. This is because if the mechanical lock mechanism described above has a backlash, the shake correction lens L2 makes a slight amount of abrupt movement during the centering operation, resulting in image shake. Therefore, the centering speed is set in order to mitigate this image blur, but a movie camera requires a smoother image movement than a still camera. Therefore, in movie mode, the centering speed is set to a smaller value. Set.

In the next step (447), the centering operation is performed according to the centering speed set in the above step (446). Then, the step (44
In 8), the mechanical lock mechanism is released, and in the following step (449), the variable amplifier AM shown in FIG.
The amplification gain A _{3 of} P3 is changed as shown in FIG.

In FIG. 16, time t ₁ is step (4
It is the time when the process moves from step 48) to step (449).
The gain of the variable amplifier AMP3 is 0 until time t ₁ , and the gain is 0 to A ₃ between time t ₁ and t _2M or t _2S.
Gradually increase. Then, the control target value V ₃ of the shake correction lens L2 gradually increases from 0, so that the lens smoothly shifts from the centering state to the image shake correcting state. Further, in the movie mode, as shown by the solid line in FIG. 16, the gain change time is made smoother from t ₁ to t _2M , while in the still mode, the gain is changed from t ₁ to t _{2S as shown} by the broken line.
Then, the image blur correction is started quickly.

Returning to FIG. 14 again, the next step (45
0), the image blur correction actuator IACT
Drive control. Then, in the next step (451), it is determined whether or not an IS stop command has come from the camera body, and if so, the process proceeds to step (432) to stop the image blur correction, and if not, the step Returning to (449), the image blur correction is continued.

Steps (449) to (451) above
It is possible to smoothly start the image blur by repeatedly executing.

Steps (449) to (451) above
If an IS stop command is transmitted from the camera body during execution of, the process returns from step (451) to (432).

Subsequently, in step (433), the gain of the variable amplifier AMP3 is decreased as shown in FIG. That is, steps (432) to (43)
The time when the process shifts to 3) is set to t _3, and the gain is gradually reduced from A ₃ to 0 during t _4M or t _4S , and the shake correction lens L2
Center gently. Also in this figure, the solid line shows the movie mode and the broken line shows the still mode, and the movie mode has a smoother centering operation.

In this step (433), the variable amplifier AM
When the gain of P3 becomes 0, the mechanical lock is performed in the next step (434), and the image blur correction actuator IACT is stopped in the following step (435).

The flow of FIGS. 13 and 14 is summarized as follows. When the switch SW1 of the camera body is turned on, the camera microcomputer causes the in-lens microcomputer to issue an image blur correction start command and the recording mode of the camera is changed to the still mode. Sends the mode signal for camera or movie mode. Then, the interchangeable lens sets the image blur correction characteristic according to the recording mode and optimizes the characteristic at the start and end of the image blur correction.

According to the fourth embodiment, 1) according to the recording mode such as still or movie,
The image blur correction accuracy can be changed.

2) The frequency characteristic of image blur correction can be changed according to the recording mode such as still or movie.

3) The operation mode at the time of starting and ending the image blur correction can be changed according to the recording mode such as still or movie. There is a feature.

(Fifth Embodiment) In the fourth embodiment, both the still camera type and the movie camera type are attachable / detachable to / from the interchangeable lens having the image blur correction device. On the other hand, the fifth embodiment below assumes a system in which the camera body unit integrated with the lens unit has both a still image recording unit and a moving image recording unit.

FIG. 18 is a block diagram showing a camera according to the fifth embodiment of the present invention. The lens unit LNS5 and the camera body unit CMR5 are integrated, and the lens microcomputer LCPU5 and the camera microcomputer CCPU are integrated. Have.

There is a half mirror HM on the optical axis in the camera, which divides the photographing light flux into a still image recording section IM51 and a moving image recording section IM52. The switch SWM0D is a recording mode selection switch. When the photographer operates the switch, either the still mode or the movie mode is selected as the recording mode of the camera body CMR5.

Also in the fifth embodiment, the image recording and the image blur correction are performed by the microcomputer CCPU5 in the camera and the microcomputer LCPU5 in the lens by the same processing as the flow of FIGS. 13 and 14 of the fourth embodiment. Done.

Therefore, according to the fifth embodiment,
In the image blur correction system having both the still and movie recording modes, the optimal image blur correction control is performed according to the selected recording mode, so that the same effect as the fourth embodiment is obtained.

(Modification) In each of the above-described embodiments, an angular displacement meter is used as the shake sensor, but the invention is not limited to this. An angular accelerometer, an accelerometer, an angular velocity meter, a speedometer, and a displacement meter. Further, any method such as a method of detecting the image shake itself may be used as long as the shake can be detected.

Further, in each of the above embodiments, the case where the lens side has the characteristic changing means provided in the in-lens microcomputer LCPU is taken as an example, but the same effect can be obtained even if the camera body side is provided. Is what you can get.

In the present invention, the image blur correction lens L2 that moves in the plane perpendicular to the optical axis is taken as an example of the means for performing the shake correction, but as another example, a light flux changing means such as a variable apex angle prism is used. Any device that can prevent the shake, such as a device that moves the shooting surface within a plane perpendicular to the optical axis, a device that corrects the shake by image processing, may be used.

Further, the present invention may be constructed by appropriately combining the above-described embodiments or their techniques.

[0202]

As described above, according to the present invention,
Regardless of the recording method for recording the subject image, the operation characteristics of the image blur correction means are varied according to the recording method of the recording means for recording the subject image formed by the photographing optical system. It is possible to obtain a good image.

Further, according to the present invention, a photographing optical system for forming a subject image, an image shake correcting means for correcting shake occurring in the photographing optical system, a recording means for recording the subject image, and the recording means. A characteristic varying means for varying the operating characteristic of the image blur correcting means according to the recording method of the recording means, and varying the operating characteristic of the image blur correcting means according to the recording method of the recording means, It is possible to always obtain a good image regardless of the recording method for recording.

Further, according to the present invention, it is necessary to change the image blur correction accuracy of the image blur correction unit according to the recording system of the recording unit to record the subject image in any recording system. In addition, it is possible to obtain sufficient image blur correction accuracy.

Further, according to the present invention, by changing the image blur correction range of the image blur correction unit according to the recording system of the recording unit, any recording system for recording the subject image can be used at that time. It is possible to set an image blur correction range that is optimal for the recording method of.

Further, according to the present invention, the image blur correction frequency characteristic of the image blur correction unit is varied according to the recording system of the recording unit to obtain the optimum image blur correction frequency for the storage system at that time. It is possible to perform image blur correction with less discomfort for camera operations such as panning.

Further, according to the present invention, the permission of the image blur correction by the image blur correction unit is permitted according to the recording method of the recording unit.
By selecting prohibition, if the recording method at that time is large in the effect of performing the image blur correction, the image blur correction is performed, and if the harmful effect of the image blur correction is large, The image blur correction is stopped and it is possible to always obtain a good image.

Further, according to the present invention, the start operation of the image blur correction by the image blur correction means is changed according to the recording system of the recording means, so that the image blur correction is started according to the storage system at that time. By making it quick or smooth slowly, it is possible to reduce the discomfort at the start of image blur correction.

Further, according to the present invention, the operation end of the image blur correction by the image blur correction means is varied according to the recording method of the recording means, so that the image blur correction is ended according to the storage method at that time. It is possible to reduce the discomfort at the end of image blur correction by making it quick or slow and smooth.

Further, according to the present invention, the size of the image pickup surface of the recording means can be switched between at least the first size and the second size, and the image can be recorded depending on which size the image is recorded. By varying the operation characteristic of the shake correction unit, it is possible to perform the image shake correction operation according to the recording at that time.

Further, according to the present invention, it is provided with a means for recording a still image and a means for recording a moving image, and by varying the operation characteristic of the image blur correction means in accordance with the recording means selected, It is possible to perform the image blur correction operation according to the recording at that time.

Further, according to the present invention, a photographing optical system for forming a subject image, an image blur correcting means for compensating a blur generated in the photographing optical system, and a recording means provided in a camera body to be mounted. And a characteristic changing means for changing the operation characteristic of the image blur correction means in accordance with the detected recording method, and changing the operation characteristic of the image blur correction means according to the recording method of the recording means. It is possible to always give a good image regardless of which recording method the camera body is attached to.

Further, according to the present invention, the camera body having any recording method can be changed by changing the image blur correction accuracy of the image blur correcting means according to the recording method of the recording means in the mounted camera body. Even if the unit is attached, it is possible to set the image blur correction range that is optimal for the recording method at that time.

Further, according to the present invention, by changing the image shake correction range of the image shake correction means according to the recording method of the recording means in the mounted camera body part, the camera body having any recording method Even if the unit is attached, the image blur correction frequency is set to the optimum storage method at that time, and it is possible to perform image blur correction with less discomfort for camera operations such as panning.

Further, according to the present invention, by selecting the permission / prohibition of the image blur correction by the image blur correction means according to the recording system of the recording means in the mounted camera body, the mounted camera body is selected. If the effect of performing image blur correction is great for the recording method of the part, the image blur correction is performed, and if the harmful effect of performing image blur correction is great, the image blur correction is stopped and a good image is always obtained. It is possible to give.

Further, according to the present invention, the start operation of the image blur correction by the image blur correction means is changed according to the recording system of the recording means in the mounted camera body portion, so that the mounted camera body portion is changed. The image blur correction can be started quickly or smoothly depending on the storage method of (1) to reduce the discomfort at the start of the image blur correction.

Further, according to the present invention, by changing the ending operation of the image blur correction by the image blur correction means according to the recording system of the recording means in the mounted camera body portion, the mounted camera body portion is changed. Depending on the storage method, the image blur correction can be completed quickly or slowly to reduce the uncomfortable feeling at the end of the image blur correction.

Further, according to the present invention, when the interchangeable lens having the recording means having a plurality of recording systems and the image blur correcting means for compensating the blur generated in the photographing optical system is mounted,
A characteristic varying unit that varies the operating characteristic of the image blur correcting unit according to the recording system of the recording unit, and by varying the operating characteristic of the image blur correcting unit according to the recording system of the recording unit, Regardless of the recording method for recording the subject image, it is possible to always obtain a good image.

[Brief description of drawings]

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

FIG. 2 is a diagram showing an image forming optical system of a camera according to each embodiment of the present invention.

FIG. 3 is a block diagram showing an image shake correction system of a camera according to each embodiment of the present invention.

FIG. 4 is a flowchart showing an operation on the camera body side according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing an operation on the interchangeable lens side in the first embodiment of the invention.

FIG. 6 is a configuration diagram showing a camera according to a second embodiment of the present invention.

FIG. 7 is a diagram showing characteristics of an image blur correction frequency according to a second embodiment of the present invention.

FIG. 8 is a flowchart showing an operation on the lens unit side in the second embodiment of the present invention.

FIG. 9 is a configuration diagram showing a camera system according to a third embodiment of the present invention.

FIG. 10 is a flowchart showing an operation on the camera body side according to the third embodiment of the present invention.

FIG. 11 is a flowchart showing an operation on the interchangeable lens side in the third embodiment of the invention.

FIG. 12 is a configuration diagram showing a camera system according to a fourth embodiment of the present invention.

FIG. 13 is a flowchart showing an operation on the camera body side according to the fourth embodiment of the present invention.

FIG. 14 is a flowchart showing an operation on the interchangeable lens side according to the fourth embodiment of the present invention.

FIG. 15 is a diagram showing characteristics of an image blur correction frequency according to a fourth embodiment of the present invention.

FIG. 16 is a diagram showing a gain characteristic of the amplifier at the start of the image blur correction operation in the fourth embodiment of the invention.

FIG. 17 is a diagram showing a gain characteristic of the amplifier at the end of the image blur correction operation in the fourth embodiment of the invention.

FIG. 18 is a configuration diagram showing a camera according to a fifth embodiment of the present invention.

[Explanation of symbols]

CMR1, CMR3, CMR4 Camera main body CMR2, CMR5 Camera main body IM1, IM51, IM52 Image recording unit SW1, SW2 switch LNS1, LNS3, LNS4 Interchangeable lens LNS2, LNS5 Lens unit LCPU1 to LCPU5 In-lens microcomputer L2 Image shake correction lens L2 SA Angular displacement meter AMP2, AMP4 amplifier FLT filter IACT image blur correction actuator

Claims (24)

[Claims] 1. A camera with an image blur correction function, wherein the operation characteristic of the image blur correction means is changed according to the recording system of a recording means for recording a subject image formed by a photographing optical system. 2. A camera with an image blur correction function, comprising: a photographing optical system that forms a subject image; an image blur correction unit that corrects a blur generated in the photographing optical system; and a recording unit that records the subject image. 2. A camera with an image blur correction function, comprising: a characteristic varying unit that varies an operation characteristic of the image blur correcting unit according to a recording method of the recording unit. 3. The camera with an image blur correction function according to claim 2, wherein the characteristic varying means varies the image blur correction accuracy. 4. The camera with an image blur correction function according to claim 2, wherein the characteristic varying means varies an image blur correction range. 5. The camera with an image blur correction function according to claim 2, wherein the characteristic varying means varies an image blur correction frequency characteristic. 6. The camera with an image blur correction function according to claim 2, wherein the characteristic varying means selects permission / prohibition of image blur correction. 7. The camera with an image blur correction function according to claim 2, wherein the characteristic varying means varies a start operation of image blur correction. 8. The camera with an image blur correction function according to claim 2, wherein the characteristic varying means varies an ending operation of the image blur correction. 9. The recording means is capable of switching the size of the image pickup surface to at least a first size and a second size, and performs recording in any size. A camera with an image blur correction function according to 2, 3, 4, 5, 6, 7 or 8. 10. The recording means has means for recording a still image and means for recording a moving image, and recording is performed by any one of the means.
A camera with an image blur correction function according to 6, 7, or 8. 11. An image pickup optical system for forming a subject image, and an image shake correction means for correcting shake generated in the image pickup optical system,
An interchangeable lens comprising: a characteristic changing unit that detects a recording method of a recording unit included in a camera body to be mounted and changes an operation characteristic of the image blur correcting unit in accordance with the recording method. 12. The interchangeable lens according to claim 11, wherein the characteristic varying means varies the image blur correction accuracy. 13. The interchangeable lens according to claim 11, wherein the characteristic varying means varies an image blur correction range. 14. The interchangeable lens according to claim 11, wherein the characteristic varying means varies the image blur correction frequency characteristic. 15. The interchangeable lens according to claim 11, wherein the characteristic changing means selects whether to permit or prohibit image blur correction. 16. The interchangeable lens according to claim 11, wherein the characteristic varying means varies a start operation of image blur correction. 17. The interchangeable lens according to claim 11, wherein the characteristic varying unit varies a termination operation of image blur correction. 18. The recording medium recording device according to claim 11, 12, 13, or 1, further comprising: recording means for recording with an image pickup surface having a first size.
A camera body that can be attached to the interchangeable lens described in 4, 15, 16 or 17. 19. The recording device according to claim 11, 12, 13, or 1, comprising recording means for recording with an image pickup surface having a second size.
A camera body that can be attached to the interchangeable lens described in 4, 15, 16 or 17. 20. A camera body mountable on the interchangeable lens according to claim 11, 12, 13, 14, 15, 16 or 17, further comprising a recording means for recording a still image. 21. A recording means for recording a moving image is provided,
Claims 11, 12, 13, 14, 15, 16 or 1 above
A camera body that can be attached to the interchangeable lens described in 7. 22. When an interchangeable lens equipped with a recording device having a plurality of recording systems and an image blur correction device for compensating for a blur generated in an image-taking optical system is attached, the recording system is adapted to the recording system of the recording medium. And a characteristic changing means for changing the operation characteristics of the image blur correcting means. 23. The recording means is capable of switching the size of the image pickup surface to at least a first size and a second size, and performs recording in any size. The camera body according to 18, 19, 20, 21 or 22. 24. The recording means has means for recording a still image and means for recording a moving image, and the recording is performed by any one of the means.
The camera body according to 1 or 22.