JP2002214663A - Lens interchangeable camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately correct an image blurring while simplifying the communications between a camera main body and an interchangeable lens. SOLUTION: This camera system is constituted of the camera main body and the interchangeable lens freely attachable to/detachable from the camera main body, and the camera main body is provided with a shake detection means (#120 to #122) detecting the shake applied to the camera system, a storage means for storing a shake signal generated when specified operation is performed in advance, an arithmetic means (#123→#125 and #126) for adding or subtracting shake output from the shake detection means and the shake signal stored in the storage means in specified timing, and a transmitting means (#127) for transmitting the arithmetically operated result by the arithmetic means to the interchangeable lens side as shake data. The interchangeable lens is provided with a receiving means receiving the transmitted shake data and a shake correction means correcting the image blur caused by the shake based on the received shake data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an improvement of a camera system having a function of correcting an image blur caused by a camera shake or the like and having an interchangeable lens.

[0002]

2. Description of the Related Art In a current camera, all operations important for photographing, such as exposure determination and focusing, are automated, so that even a person unskilled in camera operation is very unlikely to fail in photographing.

[0003] Recently, a system for preventing camera shake added to a camera has been studied, and a factor which causes a photographer to make a photographing error has almost disappeared.

Here, a system for preventing camera shake will be briefly described.

[0005] The camera shake at the time of photographing is usually a vibration of 1 to 12 Hz as a frequency, but a basic method for taking a picture without image shake even if such a camera shake occurs at the time of shutter release. As a general idea,
The camera shake due to the camera shake must be detected, and the correction lens must be displaced according to the detected value.
Therefore, in order to achieve a photograph that does not cause image shake even if camera shake occurs, first, camera vibration is accurately detected, and second, optical axis displacement due to vibration is corrected. It is necessary.

In principle, this vibration (camera shake) is detected by a shake sensor for detecting angular acceleration, angular velocity, angular displacement, and the like, and an output signal of the shake sensor is electrically or mechanically integrated to obtain the angle. This can be achieved by mounting a means for outputting displacement on a camera. Then, based on this detection information, the correction optical device for decentering the photographing optical axis is driven to perform image blur suppression.

FIG. 8 shows an image blur correcting device (composed of a correcting optical device and a blur sensor) on the interchangeable lens side of the camera system.
It is a schematic structure figure showing the example provided with.

In FIG. 8, a CPU 701 built in a camera body 700 and a C built in an interchangeable lens 702 are shown.
The PU 703 is connected via a serial bus line via the contact block 704. Then, an actuator (for example, an aperture drive or a focus drive) in the interchangeable lens 702 is driven according to a command signal from the camera body 700 transferred through the bus line.

In FIG. 8, in addition to the function of the lens, a predetermined axis P,
There are provided shake sensors 705 and 706 for detecting shake around Y, and based on data obtained by converting both outputs from the shake sensors 705 and 706 to a predetermined level, a correction optical system 707 is provided for both the above-described axes. Is driven to correct the image blur. 708 and 709 are the correction optical systems 707
Is a circuit for driving. Further, a mirror 710 that jumps upward to evacuate from the photographing optical path during actual exposure on the film surface is provided in the camera body 700, and a shutter mechanism 71 that determines a shutter speed in actual exposure.
1 is built-in.

FIG. 9 is an explanatory diagram showing a state of a shake waveform and the like associated with driving of a focal plane type shutter used in a normal single-lens reflex camera.

As shown in FIG. 9 (a), first, the shutter front curtain drive is started, and the camera moves in the opposite direction with respect to the movement direction of the shutter front curtain due to the action and reaction. As shown in FIG. 3B, the vibration appears in the downward direction in the figure. When the time t has elapsed from the start of the front curtain running, the front curtain running is completed and the movement of the shutter curtain is stopped, so that the camera moves in the opposite direction this time, and in the diagram shown in FIG. Appears as.

Usually, the running time of the shutter curtain is several milliseconds.
Therefore, the frequency of the shake caused by the running of the shutter curtain is several tens to several hundreds Hz. In general,
In the case of a shake sensor used for hand shake detection, etc., 100
It is impossible to accurately detect a frequency in the vicinity of Hz, and as shown by the solid line in FIG. 3C, the peak of the sensor output is delayed from the peak of the original shake waveform by the time ts. Become. The correction system driven to correct the shake on the actual image plane based on the output from the shake sensor also has a correction band of several tens to 100 Hz at most, and as a result, the sensor output around 100 Hz As for the shake signal, as shown by a dotted line in FIG.
The waveform becomes as if it was delayed.

As described above, the actual correction operation for the shake signal of about 100 Hz is considerably delayed in time (ts, t).
Executed in c). For this reason, as shown in FIG. 9D, the actual shake waveform on the image plane tends to increase the shake due to the correction due to the time delay, instead of correcting the shake.

As a countermeasure, a linear function correction data as shown in FIG. 9E is added to the shake sensor output (FIG. 9F), and the shake is corrected by using the data.
For example, Japanese Unexamined Patent Publication No. 9-43660 discloses that the correction remains as shown in FIG.

[0015]

The linear function correction data as shown in FIG. 9 (e) is transmitted from the camera body to the interchangeable lens side. It is necessary to transmit shake correction data (delay times T1, T2, level L) and the like.

Recently, there has also been proposed an anti-shake system in which a shake sensor is arranged in a camera body and a correction optical device is arranged in an interchangeable lens. In this case, shake data from the shake sensor in the camera body is collected. The image data is transmitted to the interchangeable lens side, and the interchangeable lens side performs shake correction by operating the correction optical device based on the received shake data.

In such a system, the amount of communication data becomes very large, and the microcomputer must spend more time in the communication processing, which may delay other processing.

(Object of the Invention) It is an object of the present invention to provide a camera system capable of accurately performing image blur correction while simplifying communication between a camera body and an interchangeable lens.

[0019]

According to one aspect of the present invention, there is provided a camera system comprising a camera body and an interchangeable lens detachable from the camera body. Is a shake detection means for detecting a shake applied to the camera system, a storage means for storing a shake signal generated when a predetermined operation is performed, a shake output of the shake detection means and a storage for the storage means. A calculating means for adding or subtracting the obtained shake signal at a predetermined timing; and a transmitting means for transmitting a calculation result of the calculating means as shake data to the interchangeable lens side, and the interchangeable lens is transmitted. A lens-exchangeable camera comprising: a receiving unit that receives the shake data; and a shake correcting unit that corrects an image shake caused by the shake based on the received shake data. It is an La system.

According to another aspect of the present invention, there is provided a camera system comprising a camera body and an interchangeable lens detachable from the camera body. Shake detection means for detecting an applied shake, storage means for storing a shake signal generated when a predetermined operation is performed, and a shake output of the shake detection means for a predetermined shutter time. A calculating means for adding or subtracting the shake signal stored in the storage means at a predetermined timing, and in the case of the predetermined shutter time, a calculation result of the calculating means as shake data,
A transmitting unit for transmitting a shake output of the shake detecting unit as shake data to the interchangeable lens side when the predetermined shutter time is not set, and the interchangeable lens transmits the shake data transmitted to the interchangeable lens. The present invention provides a camera system with interchangeable lenses, including a receiving unit for receiving, and a shake correcting unit for correcting an image shake caused by the shake based on the received shake data.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments.

(First Embodiment) First, an exploded perspective view of an image blur correcting device (composed of a blur sensor and a correcting optical device) by open control will be described with reference to FIG.

In FIG. 7, 1 is a support frame for supporting the correction lens, 2 is a ground plate for holding the support frame 1, and 3 is a first yoke which is a magnetic material fixed to the ground plate 2 by screws (not shown) or the like. Reference numeral 4 denotes a winding coil fixed to the support frame 1. 5
Is a second yoke which is a magnetic material fixed to the base plate 2 with screws or the like (not shown) so as to sandwich the support frame 1 with the first yoke 3. Reference numeral 6 denotes a permanent magnet which is magnetically attracted and fixed on the second yoke 5, and two permanent magnets are provided at positions shifted by approximately 90 °. Reference numerals 7a to 7c denote shift pins having one end press-fitted into the support frame 1 and the other end inserted into a long hole 2a provided in the base plate 2, and are approximately 120 ° around the optical axis.
It is provided radially around the optical axis at three equally spaced locations. Reference numerals 8a to 8d denote springs for elastically supporting the support frame 1 with respect to the base plate 2, one of which is positioned by a protrusion 1a provided on the support frame 1, and the other is positioned by a protrusion 2b provided on the base plate 2. In addition, four points are provided at approximately 90 ° intervals about the optical axis. The projections 1a and 2b project radially about the optical axis, and are provided so as to oppose each other on the same straight line. Therefore, the springs 8 are also arranged radially about the optical axis.

In the assembling procedure, first, the first yoke 3 is fixed to the main plate 2 through a hole 3a with screws or the like. Next, support frame 1
Is provided in the hole 1b provided in the bobbin 4b.
Insert c, and fix the winding coil 4 by bonding or the like. Then, the shift pin 7 is inserted into the support frame 1 through the long hole 2a of the main plate 2.
Into the hole 1c provided in the hole. Thereby, the movement of the support frame 1 in the optical axis direction with respect to the base plate 2 is restricted, but the support frame 1 can move in directions other than the optical axis direction. Next, one of the springs 8 is attached to the projection 1 a provided on the support frame 1, and the other is attached to the projection 2 b provided on the base plate 2. As a result, the support frame 1 is held substantially at the center of the optical axis. Then the second
The permanent magnet 6 is magnetically attracted and fixed to the yoke 5.
Finally, the second yoke 5 is fixed to the base plate 2 with screws or the like so that the support frame 1 is sandwiched between the first yoke 3 and the second yoke 5.

The permanent magnet 6 and the coil 4 are arranged so as to face each other. Since the second yoke 5 is a magnetic material, a known closed magnetic path is formed between the first yoke 3 and the permanent magnet 6, and the winding provided in the closed magnetic path and fixed to the support frame 1. By energizing the wire coil 5, a thrust is generated and the support frame 1 is driven at an arbitrary stroke.
Further, when no power is supplied, the support frame 1 is held at a substantially central position by the spring 8 and the springs 8 are provided at four positions at substantially equal intervals of 90 °. Has not changed.

Reference numerals 9a and 9b denote shake sensors built in the camera body, which convert the signals into shake data appropriately on the camera body side and transmit the data to the interchangeable lens. Then, on the interchangeable lens side, a calculation is performed based on the shake data, a driving amount of the correction lens is calculated so as to cancel the shake, and the winding frame 4 is energized to control the support frame 1 to thereby control the image plane. Ensure stability.

FIG. 1 is a block diagram showing a configuration of a main part of a camera system provided with the above-described image blur correction device.

In FIG. 1, reference numeral 31 denotes a lens MPU provided on the interchangeable lens side, which controls the interchangeable lens side by communicating with the camera body. Based on the shake data transmitted from the camera body, the coil driver 3
Then, the correction lens is driven via 2 to perform image blur correction. In addition to the above-described image shake correction control, the lens MPU 31 drives a focus lens and a diaphragm drive via a position detector 33 for detecting a position (zone) of zoom / focus and motor drivers 34 and 35. It is carried out. Further, the lens MPU 31 performs camera / lens communication with the camera MPU 38, confirms the status (focal length, SW state, etc.) of each camera / lens, transmits / receives driving commands such as focus / aperture, and receives shake data. Or

36 (ISSW) is an image blur correction (Image Sta.
operation selection switch 37 (A)
/ MSW) is a switch for selecting between auto focus and manual focus.

Reference numeral 38 denotes a camera M provided on the camera body side.
It is a PU, which controls a photometric unit and a distance measuring unit (not shown), and controls a mirror unit 42 and a shutter unit 41 for photographing. The built-in ROM stores in advance predetermined waveforms of the camera, for example, shake waveform data generated by an impact when the front curtain of the shutter runs, and shake waveform data generated by an impact when the quick return mirror is raised. . Further, since the level of the shake caused by the impact varies depending on the attached interchangeable lens, a plurality of shake waveform data corresponding to each of the attachable interchangeable lenses is stored in advance.

Reference numeral 39 denotes a shake sensor (corresponding to 9a and 9b in FIG. 7) for detecting shake, and the detected shake output is H
The signal is input to the PF / amplification / LPF circuit 40, where the DC component is cut, amplified, and noise removed, and the camera MP
It is input to the A / D conversion terminal of U38. Then, the camera MPU 38 performs an operation such as high-pass / integration on the A / D-converted shake angular velocity signal, and then transmits the calculated data to the interchangeable lens as shake data.

Reference numeral 43 denotes a release switch, which is generally a two-stage stroke switch. The switch SW1 is turned on at the first stroke of the release switch 43.
Then, the release switch SW2 is turned on in the second stroke.

Here, the specific operation of the camera MPU 38 will be described with reference to the flowcharts shown in FIGS.

FIG. 2 shows the main flow of the operation of the camera MPU 38 related to the image blur correction operation.

First, in step # 100, the process waits for the switch SW1 to be turned on, and turns off the switch SW1.
When N is detected, the process proceeds to step # 101, and a photometric operation is performed. Then, in the next step # 102, focus control is performed. This is performed by detecting a subject image with an optical sensor (not shown), obtaining a defocus amount by calculation, and transmitting a focus drive command to the interchangeable lens side (lens MPU 31). In the following step # 103, it is determined whether or not the subject is in focus. If not, the process returns to step # 102 and focus control is performed again.

If it is determined in step # 103 that the object is in focus, the process proceeds to step # 104, where it is determined whether the switch SW2 is turned on. As a result, if the switch SW2 is ON, step # 1
Proceeding to 05, a mirror-up operation is performed to perform photographing.
Then, in the next step # 106, an aperture drive command is transmitted to the interchangeable lens side, and in the following step # 107, the front curtain travel operation is performed, and exposure is started. Thereafter, the process proceeds to step # 108, and waits until the set shutter time Tv elapses. When the shutter time Tv elapses, the process proceeds to step # 109 to perform the rear curtain running operation and end the exposure. Then, in the next step # 110, an aperture opening command is transmitted to the interchangeable lens side, and finally in step # 1.
In step 11, a mirror down operation is performed, and step # 1 is performed.
Return to 00.

During the above operation, the camera MPU 38
Transmits the status of the camera such as ON of the switches SW1 and SW2 to the interchangeable lens side, and obtains a lens ID for determining the attached interchangeable lens by communication with the interchangeable lens.

FIG. 3 is a flowchart showing a shake detection interrupt operation which is performed at regular intervals during the operation of the main flow of FIG. 2, and will be described below.

First, in step # 120, A / D conversion of the output of the shake sensor 39 is performed. Then, in the next step # 121, a high-pass filter operation is performed to cut low-frequency components. In the following step # 122, an integral operation is performed to obtain angular displacement data (AH_DATA) from the angular velocity data.

In step # 123, it is determined whether or not it is the timing for driving the shutter front curtain. If not, the process proceeds to step # 124, and since it is not the timing for driving the shutter front curtain, the angle obtained in step # 122 is obtained. The displacement data (AH_DATA) is set as shake lens transmission data (LB_DATA), and the flow advances to step # 127.

If it is the timing to drive the shutter first curtain, the process proceeds to step # 125, where the lens MPU 38
The arbitrary waveform data (SH
_DATA (n)). This arbitrary waveform data (S
H_DATA (n)) is waveform data corresponding to a state in which the type of the attached interchangeable lens is determined based on the lens ID and combined with the interchangeable lens, and is a shake signal due to an impact when the front curtain of the shutter runs. In addition, it is desirable to consider the shake due to the impact when the quick return mirror is raised. However, for simplification of the description, the description is omitted in the present embodiment.

The arbitrary waveform data (SH_DAT)
A (n)) is data that changes with time from the timing (n = 0) of driving the shutter first curtain. Then, in the next step # 126, the angular displacement data (AH_DATA) obtained in the above step # 122 is added to the above-mentioned step # 12.
5 is added to the arbitrary waveform data (SH_DATA (n)) (K
H_DATA + SH_DATA (n) → LB_DATA)
The result is then transmitted to the lens transmission shake data (LB_DAT
A) is set. When the shutter running direction is reversed, it can be dealt with by subtracting the arbitrary waveform data (SH_DATA (n)).

Then, in the next step # 127,
The lens transmission shake data (LB_DATA) is transmitted to the interchangeable lens as 2-byte data.

Thus, the interruption is completed.

By this interrupt operation, shake data in consideration of arbitrary waveform data which is a stored value of the shutter front curtain running shake signal can be transmitted to the interchangeable lens side.

Next, the main operation of the lens MPU 31 will be described.
This will be described with reference to the flowchart of FIG.

When the interchangeable lens is mounted on the camera body, serial communication is performed from the camera MPU 38 to the lens MPU 31, and the lens MPU 31 starts operation from step # 130.

First, in step # 130, initial settings for lens control and image blur correction control are performed. Then, in the next step # 131, the switch ISS
W, A / MSW state detection and zoom / focus position detection are performed. In the following step # 132, it is determined whether or not there is a focus drive request communication from the camera MPU 38, and if there is a focus drive request, step # 1 is performed.
The process proceeds to step 33, where a drive amount of the focus lens is instructed from the camera MPU 38, and focus drive control is performed accordingly.

If there is no focus drive request, the process proceeds to step # 134, where image blur correction operation start control such as setting of an image blur correction start flag IS_START is performed in accordance with the communication from the camera MPU 38 and the state of the switch ISSW. Then, in the next step # 135, it is determined whether or not an instruction to stop all driving (to stop all driving of the actuator in the lens) has been received from the camera MPU. If no operation is performed on the camera body side, the full drive stop command is transmitted from the camera MPU 38 after a while. Then, in the next step # 136, full drive stop control is performed. Here, all actuator driving is stopped, and the lens MPU 31 enters a sleep (stop) state. Power supply to the image blur correction device is also stopped.

Thereafter, when any operation is performed on the camera body, the camera MPU 38 sends communication to the lens MPU 31 to release the sleep state.

During these operations, if there is a serial communication interrupt request by communication from the camera MPU 38, the interrupt processing is performed. The communication includes the shake data communication described above.

In the serial communication interrupt processing, communication data is decoded, and lens processing such as, for example, aperture driving is performed according to the decoding result. Then, by decoding the communication data, the switch SW1 is turned on and the switch SW2 is turned on.
N, shutter time, camera model, etc. can be determined.

The shake data communication is transmitted from the camera MPU 38 at regular intervals (for example, 500 μsec).

The operation of the shake data communication processing of the lens MPU 31 will now be described with reference to the flowchart of FIG.

Upon receiving the shake data communication, the lens MPU 31 operates from step # 140. And
In the next step # 140, the state of the image blur correction start flag IS_START is determined, and IS_START =
If 0, the process proceeds to step # 141, where the correction lens driving data (DRV_DATA) is cleared, and step # 14 is performed.
Proceed to 4. On the other hand, if IS_START = 1, the process proceeds to step # 142 to obtain image stabilization sensitivity data (ISB_DATA) from the zoom / focus position. This corresponds to the shake data (LB_DAT) transmitted from the camera MPU 38.
This is data for converting A) into a movement amount of the correction lens. Then, in the next step # 143, the camera M
The shake data (LB_DAT) sent from the PU 38
A) and correction lens driving data (DRV_DATA) are obtained from the image stabilization sensitivity data (ISB_DATA). Finally, in step # 144, the lens M is set as the correction lens driving data (DRV_DATA) as PWM.
Output to the port of PU31. Then, the output is input to the coil driver 32, the correction lens is driven by the coil and the magnet, and image blur correction is performed.

As described above, the signal processing of the shake sensor 39 is performed on the camera body side (# 120 to # 12 in FIG. 3).
2) In addition, the signal processing data and arbitrary waveform data stored in the camera body (which is a shake signal caused by an impact when the front curtain of the shutter travels when combined with the attached interchangeable lens) are added. Result (# 125 to # 1
26) is transmitted to the interchangeable lens side (# 127), and the interchangeable lens side performs image shake correction based on the received data (# 142 to # 144 in FIG. 5). Communication and shutter shake correction data communication can be omitted, and shake communication can be simplified.

(Second Embodiment) Second embodiment of the present invention
In the embodiment, an example will be described in which arbitrary waveform data (shutter front curtain running shake signal) and shake sensor signal processing data are added on the camera body only at a predetermined shutter time, and the result is transmitted to the interchangeable lens.

The circuit configuration of the camera system is the same as that of FIG. The main operation of the camera MPU 38 is the same as that in the flowchart of FIG. 2, and the operation of the lens MPU 31 is the same as that of the flowcharts in FIGS.

A camera M different from the first embodiment described above
The shake detection interrupt operation in the PU 38 will be described with reference to the flowchart in FIG.

In FIG. 6, step # 150 is a characteristic operation in the second embodiment of the present invention, and the other operations are the same as those in FIG. Is omitted.

When the leading curtain drive timing is detected in step # 123, the process proceeds to step # 150, where it is determined whether the shutter time Tv is a predetermined time (1/60 to 1/250), and the predetermined time is determined. If it is time, the process proceeds to step # 125, and arbitrary waveform data (SH_DATA (n)) stored in the ROM in the lens MPU 31 and step # 12.
2 is added to the angular displacement data (AH_DATA) obtained, and the result is added to the shake lens transmission data (LB_DAT).
A) is transmitted to the interchangeable lens side.

On the other hand, if it is other than the predetermined second, step #
From 150, the process proceeds to step # 124, where the addition of the arbitrary waveform data (SH_DATA (n)) is performed. Only the angular displacement data (AH_DATA) is transmitted to the interchangeable lens side as shake lens transmission data (LB_DATA).

As described above, the signal processing of the shake sensor 39 is performed on the camera body side (# 120 to # 12 in FIG. 6).
2) The result of adding the above-mentioned shake sensor signal processing data and arbitrary waveform data only at a predetermined shutter time (#
150 → # 125 to # 126) is transmitted to the interchangeable lens side (# 127), and the interchangeable lens side performs image blur correction based on the received data (# 142 to # 1 in FIG. 5).
44) The shutter shake timing communication and the shutter shake correction data communication can be omitted as compared with the related art, and the shake communication can be simplified. By performing the above addition only at a predetermined shutter time (1/60 to 1/250) during which the influence of the shutter shake is large among the shakes in the exposure period, more accurate shake data can be set. It becomes possible. Note that the shutter time at which the above addition is performed is set to “1”.
/ 60 to 1/250 ”
In the case of a shutter time faster than 0 to 1/250, the waveform of the shutter first curtain and the rear curtain overlap, and in the case of a slow shutter time, shutter shake occurs only in the first period of the exposure period. Therefore, the effect is reduced.

(Modification) In each of the above embodiments, the MP
Although an example in which digital control using U is used has been described, analog control may be used.

As storage means, R in the camera MPU is used.
Although the example using the OM has been described, an external EEPROM or the like may be used.

In addition, although the portion (correction optical device) of the image blur correction device other than the shake sensor is incorporated in the interchangeable lens, the correction optical device is not provided in the interchangeable lens but is mounted in front of the interchangeable lens. It may take the form of an accessory that fits inside any of the conversion lenses.

In each of the above embodiments, an angular velocity sensor is used as an example of a shake sensor. However, an angular acceleration sensor, an acceleration sensor, a speed sensor, an angular displacement sensor, a displacement sensor, and a method of detecting an image shake itself. For example, any type can be used as long as the shake can be detected.

[0068]

As described above, according to the present invention,
While simplifying the communication between the camera body and the interchangeable lens,
It is possible to provide a camera system capable of accurately performing image blur correction.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a main operation in the camera MPU of FIG. 1;

FIG. 3 is a flowchart showing a shake detection operation in the camera MPU of FIG. 1;

FIG. 4 is a flowchart showing a main operation in the lens MPU of FIG. 1;

FIG. 5 is a flowchart showing an image blur correction control operation in the lens MPU of FIG. 1;

FIG. 6 is a camera MPU according to a second embodiment of the present invention.
5 is a flowchart showing a shake detection operation in the embodiment.

FIG. 7 is an exploded perspective view of the image blur correction device according to each embodiment of the present invention.

FIG. 8 is a schematic configuration diagram showing an example in which a conventional camera system is provided with an image stabilizing system on an interchangeable lens side.

FIG. 9 is an explanatory diagram showing a state of a shake waveform and the like associated with driving of a focal plane type shutter used in a normal single-lens reflex camera.

[Explanation of symbols]

 31 Lens MPU 32 Coil driver for driving a correction lens 36 Image blur correction selection switch 38 Camera MPU 39 Blur sensor

Claims (6)

[Claims] 1. A camera system comprising: a camera body; and an interchangeable lens detachable from the camera body, wherein the camera body performs a shake detecting means for detecting a shake applied to the camera system, and performs a predetermined operation. Storage means for preliminarily storing a shake signal generated at the time, calculation means for adding or subtracting a shake output of the shake detection means and a shake signal stored in the storage means at a predetermined timing; and Transmitting means for transmitting a calculation result as shake data to the interchangeable lens side, the interchangeable lens receiving means for receiving the shake data transmitted, and receiving the shake data based on the received shake data. A camera system with interchangeable lenses, comprising: a shake correcting unit for correcting image shake caused by the image. 2. A camera system comprising a camera body and an interchangeable lens detachably attached to the camera body, wherein the camera body performs a shake detecting means for detecting a shake applied to the camera system, and performs a predetermined operation. Storage means for preliminarily storing a shake signal generated at the time, and, at a predetermined shutter time, adding or subtracting a shake output of the shake detection means and a shake signal stored in the storage means at a predetermined timing. Calculating means, and in the case of the predetermined shutter time, the calculation result of the calculating means is used as shake data, and in cases other than the predetermined shutter time, the shake output of the shake detection means is used as shake data. Transmitting means for transmitting to the interchangeable lens side; the interchangeable lens includes a receiving means for receiving the transmitted shake data; and a transmitting means for receiving the shake data based on the received shake data. Lens interchangeable camera system characterized by having a shake correction means for correcting image vibration caused by shaking said are. 3. The storage means stores in advance the shake signal for each of a plurality of interchangeable lenses that can be mounted on the camera body, and the calculation means corresponds to the type of the currently mounted interchangeable lens. The camera system according to claim 1 or 2, wherein the shake signal is selected, and the shake data is calculated by adding or subtracting the shake signal to or from a shake output of the shake detection means. 4. The camera system according to claim 1, wherein the predetermined operation is an operation in which a mechanical operation unit operates. 5. The lens replacement according to claim 4, wherein the operation in which the mechanical working portion of the camera operates is an operation relating to driving of a quick return mirror or shutter driving provided in the camera body. Possible camera system. 6. The camera system according to claim 1, wherein said storage means is a rewritable nonvolatile memory.