JP2003131282A - Single lens reflex camera system capable of preventing image blur - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent failure at the time of attaching a conventional interchangeable lens having no image blur correcting optical system to a single lens reflex camera having an image blur detecting means in a camera main body and having an image blur correcting optical system in an interchangeable lens. SOLUTION: When the interchangeable lens having no image blur correcting optical system is attached to the camera main body having the image blur detecting means, warning operation is performed by a warning means such as an LED in the camera man body, and also energizing the image blur detecting means is stopped to conserve energy, and further operation for transferring the detected output data by the image blur detecting means to the interchangeable lens is stopped to shorten communication time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image blur prevention single-lens reflex camera system in which an interchangeable lens is attached to a camera body, and in particular, a sensor for detecting blurring of the image blur prevention device is provided on the camera body side. Furthermore, the image stabilization single-lens reflex camera system in which the correction optical system of the image stabilization device is on the interchangeable lens side.

[0002]

2. Description of the Related Art Conventionally, there have been proposed many single-lens cameras which are equipped with detachable interchangeable lenses and which have an image blur correction device for preventing camera shake during photographing.

Most of them have both an image blur detecting means and an image blur correcting optical system in an interchangeable lens, and the start and end of the image blur correcting operation are controlled by operating the operating means on the camera side.

At present, a gyro sensor is generally used as the blur detecting means, but at least two gyro sensors are required for detecting the pitch direction and the yaw direction, and the structure is still expensive. In a system camera such as a single-lens reflex camera, it is desirable to arrange such high cost elements on the camera body side to reduce the cost of the interchangeable lens.

From this point of view, an image blur single-lens reflex camera system having an image blur detecting means in a camera body and an image blur correcting optical system in an interchangeable lens is disclosed in Japanese Patent Laid-Open No. 6-250272.
It has been proposed in the Japanese publication.

[0006]

In the conventional system having both the image blur detecting means and the image blur correcting optical system in the interchangeable lens, the image blur compensating device is completed in the interchangeable lens, and therefore, the single lens reflex camera. Whether or not the system has an image blur correction function can be clearly determined by whether or not the interchangeable lens to be mounted has an image blur correction device.

On the other hand, the image blur preventing single-lens reflex camera system having the image blur detecting means in the camera body and the image blur correcting optical system in the interchangeable lens is exchanged with the camera body as an interchangeable lens. The image blur correction function works only when used in combination with lenses.

If the camera body having the image blur detecting means and the conventional general interchangeable lens not having the image blur correcting optical system are used in combination, the image blur correcting function naturally does not work.

In this case, the user generally has an image blur correction function as the entire system even if the interchangeable lens does not have an image blur correction device because the camera body has an image blur detection means. It is easy to misunderstand that in this case, the frequency of accidentally taking a picture with large camera shake will increase.

[0010]

SUMMARY OF THE INVENTION The present invention was devised for the purpose of solving the above problems, and its main purpose is to provide an image blur correction optical system in a camera body having the image blur detection means. When wearing a conventional interchangeable lens,
This is because a warning operation is performed to warn that the single-lens reflex camera system does not have an image blur correction function.

Further, in the present invention, when a conventional interchangeable lens having no image blur correction means is attached to the camera body having the image blur detection means, the power supply to the image blur detection means in the camera body is stopped. I also try to aim at the energy saving effect.

Further, in the present invention, when a conventional interchangeable lens having no image blur correction means is attached to the camera body having the image blur detection means, a communication operation of an output signal of the image blur detection means to the interchangeable lens is performed. I am also trying to reduce the communication time by stopping.

The present invention can be summarized in the following configurations if it is summarized and summarized as above.

(1) In an image blur preventing single-lens reflex camera system having an image blur detecting means on the camera body side and an image blur correcting optical system on the interchangeable lens side, a conventional interchangeable lens not having an image blur correcting optical system. An image blur preventing single-lens reflex camera system having warning means for performing a warning operation when the camera is attached to the camera body having the image blur detecting means.

(2) The image blur preventing single-lens reflex camera system according to (1), wherein the warning means is provided inside the camera body.

(3) The image blur preventing single-lens reflex camera system as described in (1) above, wherein the warning means is a light emitting diode.

(4) An image blur prevention single-lens reflex camera system having a power source battery and image blur detection means on the camera body side and an image blur correction optical system on the interchangeable lens side, which does not have an image blur correction optical system in the related art. An image blur preventing single-lens reflex camera system characterized in that when the interchangeable lens of (1) is attached to the camera body having the image blur detecting means, the power supply from the power supply battery to the image blur detecting means is stopped.

(5) Image blur prevention having an image blur detection means and data transfer means for transferring the output of the image blur detection means to the interchangeable lens side in the camera body, and having an image blur correction optical system on the interchangeable lens side In a single-lens reflex camera system, when a conventional interchangeable lens having no image blur correction optical system is attached to the camera body having the image blur detecting means, a data transfer operation of the output of the image blur detecting means to the interchangeable lens side Image blur prevention single-lens reflex camera system characterized by stopping.

(6) The image blur preventing single-lens reflex camera system according to (5), wherein the data transfer means includes a microcomputer.

(7) The image blur detecting means is composed of at least two image blur detecting sensors arranged in at least a pitch direction and a yaw direction, (1), (4) or (5). An image blur-preventing single-lens reflex camera system according to any one of the above.

(8) The image blur preventing single-lens reflex camera system described in (7), wherein the image blur detecting sensor is a gyro sensor.

(9) Any of the above (1), (4) or (5), characterized in that the interchangeable lens having the image blur correction optical system has an identifying means for indicating that the image blur correction optical system is included. The described single-lens reflex camera system for preventing image blur.

(10) The image blur preventing single-lens reflex camera system as described in (9) above, wherein the identifying means is digital information stored in a ROM.

(11) The image blur preventing single-lens reflex camera system as described in (9) above, wherein the identifying means is a terminal provided on the lens mount portion.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) The present invention will be described in detail based on the following embodiments.

1 and 2 are electric circuit diagrams showing a first embodiment of the present invention.

FIG. 1 shows a single-lens reflex camera system in which an image blur correction function is activated by mounting an interchangeable lens having an image blur correction optical system on a camera body having image blur detection means.

In the figure, firstly, regarding the configuration requirements in the camera body, 10
Is a power supply battery, 11 is a diode for preventing backflow, and 12 is a capacitor for power supply coupling.

Reference numeral 13 is a microcomputer in the camera body, and 14 and 31 are gyro sensors arranged in the camera body as image blur detecting means in the pitch direction and the yaw direction, respectively. Reference numeral 32 denotes an input switch, which is a control signal from the microcomputer 13 and is used for the gyro sensor 14 in the pitch direction and yaw direction.
The inputs of 31 and 31 are switched and output. Reference numeral 15 is an A / D converter connected to the output of the input switch 32. 1
Reference numeral 6 is a FET transistor which constitutes a power switch for controlling power supply to the gyro sensors 14 and 31, the input switch 32 and the A / D converter 15, and the microcomputer 1
Controlled by 3 output ports.

Reference numeral 18 denotes an LED connected between the output port of the microcomputer 13 and the power supply battery Vbat, which is used as a single lens reflex camera system when a conventional interchangeable lens having no image blur correction optical system is mounted as described above. This is a warning operation that the image blur correction function is not provided.

Reference numeral 17 denotes an FET transistor which constitutes a power switch connected to the power battery 10 and is controlled by the output port of the microcomputer 13 to control ON / OFF of power supply from the camera body to the interchangeable lens. Reference numeral 19 denotes S which is turned on by the first stroke of the shutter button (not shown) of the camera body.
The W1 switch is connected to the input port of the microcomputer 13.

Reference characters a to f are mount terminals installed in the camera body. The positive terminal Vbat of the battery 10 is connected to the terminal a through the switch 17 and the terminal b is connected to the power source Vdd of the control system. There is. The terminal c is connected to the input port of the microcomputer 13 for the data DLC sent from the interchangeable lens to the camera body. The terminal d is connected to the output port of the microcomputer 13 for the data DCL sent from the camera body to the interchangeable lens. In addition, the terminal e is a microcomputer 13 of a synchronous clock CLK sent from the camera body to the interchangeable lens.
Each is connected to the output port of.

The terminal f is connected to the negative terminal of the battery 10.

Next, regarding the constitutional requirements in the interchangeable lens, 20 is a microcomputer in the interchangeable lens, and 21 and 22 are driver circuits in the pitch direction and the yaw direction of the image blur correction optical system. Two
A D / A converter 5 converts the digital value of the main port of the microcomputer 20 into an analog value and inputs it to the driver circuits 21 and 22.

Reference numerals 23 and 24 denote position detecting means for detecting the absolute position of the correction optical system arranged in the pitch direction and the yaw direction, respectively, and 26 denotes an A / D converter for the position detecting means 2
The outputs of 3 and 24 are A / D converted and input to the input port of the microcomputer 20.

The correction optical system is not shown in this figure.

Reference symbols a ′ to f ′ are mount terminals installed on the interchangeable lens side. When the interchangeable lens is mounted on the camera body, the mount terminals a ′ to f ′ on the interchangeable lens side are mounted terminals a to f on the camera body side, respectively. Connect with. In the interchangeable lens, the terminal a'is connected to the power supply terminals of the driver circuits 21 and 22. The terminal b'is connected to the power supply terminal of the microcomputer 20 and the terminal c'to the output port of the microcomputer 20.

The terminals d'and e'are connected to the input port of the microcomputer 20, and the terminal f'is connected to the ground terminal of the microcomputer 20.

The operation of this embodiment configured as described above will be described with reference to the flowchart of FIG.

The first stroke of the release button of the camera body is pressed and the SW1 switch 19 is turned on. Then, the ID code request command unique to each interchangeable lens is transferred from the camera side microcomputer 13 to the interchangeable lens side microcomputer 20 through the communication line DCL.

When the microcomputer 20 on the lens side receives this request command, the ID code peculiar to each interchangeable lens written in the ROM of the microcomputer 20 in the lens is transferred to the microcomputer 13 in the camera body via the communication line DLC. Transfer to. From the transferred ID code, the microcomputer 13 in the camera body can identify that the attached interchangeable lens has an image blur correction optical system. Therefore, each output port is controlled and the power switch 16 and 17
Turn on.

Therefore, the gyro sensor 1 in the camera body
Power is supplied to 4 and 31, the input switch 32, and the A / D converter 15.

At this time, the following method can be considered as a method for the microcomputer 13 in the camera body to judge whether or not the interchangeable lens has an image blur correction optical system from the ID code unique to the interchangeable lens.

One is the RO of the microcomputer 13 of the camera body.
This is a method in which a table is provided in M for each ID code of the interchangeable lens, one having a correction optical system and one having no correction optical system.

Still another method is to specify a specific bit in the ID code as a bit indicating the presence / absence of a correction optical system, and if the bit is "1", judge that the correction optical system is provided. Is.

Next, the input selector 32 alternately outputs the output of the gyro sensor 14 in the pitch direction and the output of the gyro sensor 31 in the yaw direction in response to a control signal from the microcomputer 13.
Input to the / D converter 15. Therefore, the A / D converter 15
Then, the digitized signals of the outputs of the gyro sensor in the pitch direction and the yaw direction are alternately input to the microcomputer 13.

The microcomputer 13 converts the input digital signal into a serial signal and transfers it from the output port DCL to the microcomputer 20 on the interchangeable lens side.

On the interchangeable lens side, the outputs of the absolute position detecting means 23 and 24 of the correction optical system are converted into digital data by the A / D converter 26 and input to the microcomputer 20.
The microcomputer 20 can identify the position of the correction optical system at that time.

On the other hand, the gyro outputs in the pitch direction and the yaw direction are alternately input from the microcomputer 13 on the camera body side to the microcomputer 20 of the interchangeable lens. The microcomputer 20 digitally integrates this signal at any time, and from this integrated signal the camera To obtain the angular displacement signal of.

The microcomputer 20 calculates an amount to be driven by the correction optical system from the angular displacement signal of the camera and the position signal of the correction optical system, and the calculated digital data is converted into an analog signal by the D / A converter 25. The converted analog signal is input to the driver circuits 21 and 22, and the correction optical system is driven according to the signal.

In this way, the image blur correction operation is performed.

Next, the operation when the conventional interchangeable lens having no image blur correction optical system is attached to this camera body is shown in FIG.
It will be explained based on.

In the figure, the camera body has the same structure as that of FIG.

Since the interchangeable lens side has no correction optical system, the driver circuits 21 and 22 and the position detecting means 23 and 24 are not provided.

The operation of FIG. 2 configured as above will be described.

The first stroke of the release button of the camera body is pressed and the SW1 switch 19 is turned on. Then, the ID code request command unique to each interchangeable lens is transferred from the camera side microcomputer 13 to the interchangeable lens side microcomputer 20 through the communication line DCL.

When the microcomputer 20 on the lens side receives this request command, the ID code peculiar to each interchangeable lens written in the ROM of the microcomputer 20 in the lens is transferred to the microcomputer 13 in the camera body via the communication line DLC. Transfer to. From the transferred ID code, the microcomputer 13 in the camera body can identify that the interchangeable lens mounted by the method described above does not have the image blur correction optical system. The power switch 16 is controlled to be turned off. Therefore, power is not supplied to the gyro sensors 14 and 31 in the camera body, the input switch 32 and the A / D converter 15, and useless power consumption is prevented.

Further, the microcomputer 13 controls the output port to set L
The ED 18 is made to blink.

Since the LED 18 is arranged in the finder optical system (not shown) of the camera body, this blinking operation enables the photographer to recognize that the image blur correction function does not work.

On the other hand, the power switch 17 is turned on by controlling the output port of the microcomputer 13. This allows power to be supplied to an actuator (not shown) for focus operation in the interchangeable lens.

Further, the microcomputer 13 on the camera side does not transfer the output signal of the gyro sensor to the interchangeable lens to shorten the communication time between the camera body and the interchangeable lens.

(Embodiment 2) Next, a second embodiment is shown in FIGS.

In the first embodiment, whether the interchangeable lens side has the image blur correction optical system is determined by the microcomputer of the camera body from the ID code unique to the interchangeable lens transferred from the interchangeable lens to the camera body. I was doing.

In the second embodiment, the above-mentioned discrimination is performed by providing a new mount terminal on the interchangeable lens having the image blur correction optical system and the camera body having the image blur detecting means.

Of the constituents in FIG. 4, the description of the same constituents as in FIG. 1 will be omitted.

Reference numeral g denotes a new mount terminal provided on the camera body, which is connected to the input port of the microcomputer 13 of the camera body. Further, this terminal g is connected to the power supply Vdd via the pull-up resistor 33.

Reference numeral g'denotes a new mount terminal provided on the interchangeable lens side, which is connected to the ground terminal f '.

When this interchangeable lens is mounted on the camera body, the terminal g is connected to the terminal g ', so that its potential becomes the ground level. Since the input port is at the ground level, the microcomputer 13 determines that the attached interchangeable lens has the image blur correction optical system.

On the other hand, FIG. 5 shows a case where a conventional interchangeable lens having no image blur correction optical system is attached to a camera body having an image blur detecting means.

In this case, there is no new mount terminal g'on the interchangeable lens side. Therefore, the terminal g on the camera body side
Is pulled up by the pull-up resistor 33, its potential becomes Vdd. Since the microcomputer 13 in the camera body has the potential of this input port at the Vdd level,
It is determined that the attached interchangeable lens does not have an image blur correction optical system.

Since the other operations in FIGS. 4 and 5 are the same as those in the first embodiment, the description thereof will be omitted.

[0072]

As described above in detail with reference to the embodiments, the present invention has the image blur detecting means in the camera body,
In addition, even if the interchangeable lens that does not have the conventional image blur correction optical system happens to be attached to the single lens reflex camera system that has the image blur correction optical system in the interchangeable lens, the photographer will perform the warning operation, You can recognize that the image stabilization function does not work.

At the same time, the energization of the image blur detecting means is stopped so that there is an energy saving effect.

Further, since the transfer operation of the output data of the image blur detecting means to the interchangeable lens side is stopped, the communication time between the camera body and the interchangeable lens can be shortened, which has many effects. is there.

Although the gyro sensor is used as the image blur detecting means in the above embodiments, the present invention is not limited to this, and all speed detecting sensors and acceleration detecting sensors can be applied.

Further, whether or not there is an image blur correction optical system on the interchangeable lens side is identified by the ROM data of the microcomputer in the interchangeable lens and the mount terminal of the interchangeable lens, but the present invention is not limited to this. Not something.

Further, although the LED is used as the warning means, it goes without saying that other display means such as liquid crystal can be applied.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram when a vibration-proof interchangeable lens is attached in the first embodiment.

FIG. 2 is an electric circuit diagram when the conventional interchangeable lens is mounted in the first embodiment.

FIG. 3 is a flowchart showing the operation of the first embodiment.

FIG. 4 is an electric circuit diagram when a vibration proof interchangeable lens is attached in the second embodiment.

FIG. 5 is an electric circuit diagram when a conventional interchangeable lens is mounted in the second embodiment.

[Explanation of symbols]

10 power battery 13,20 Microcomputer 14,31 Gyro sensor 15,26 A / D converter 16,17 FET switch 18 LED for warning Driver circuit of the correction optical system 23, 24 Position detecting means of correction optical system 25 D / A converter

Claims (11)

[Claims] 1. An image blur detection means is provided on the camera body side,
In an image blur prevention single-lens reflex camera system having an image blur correction optical system on the interchangeable lens side, when a conventional interchangeable lens having no image blur correction optical system is attached to the camera body having the image blur detection means, a warning operation is performed. An image blur preventing single-lens reflex camera system having a warning means for performing the following. 2. The image blur preventing single-lens reflex camera system according to claim 1, wherein the warning means is provided inside the camera body. 3. The image stabilizing single-lens reflex camera system according to claim 1, wherein the warning means is a light emitting diode. 4. An image blur prevention single-lens reflex camera system having a power supply battery and image blur detection means on the camera body side and an image blur correction optical system on the interchangeable lens side, which does not have the conventional image blur correction optical system. An image blur preventing single-lens reflex camera system characterized in that when an interchangeable lens is attached to a camera body having the image blur detecting means, power supply from the power source battery to the image blur detecting means is stopped. 5. An image blur preventing single-lens having an image blur detection means and a data transfer means for transferring an output of the image blur detection means to an interchangeable lens side in the camera body, and an image blur correction optical system on the interchangeable lens side. In a reflex camera system, when a conventional interchangeable lens having no image blur correction optical system is attached to a camera body having the image blur detecting means, a data transfer operation of the output of the image blur detecting means to the interchangeable lens side is performed. Image blur prevention single-lens reflex camera system characterized by stopping. 6. The image stabilizing single-lens reflex camera system according to claim 5, wherein the data transfer means includes a microcomputer. 7. The image blur detection device according to claim 1, wherein the image blur detection unit is composed of at least two image blur detection sensors installed in a pitch direction and a yaw direction. Prevention single-lens reflex camera system. 8. The image blur prevention single-lens reflex camera system according to claim 7, wherein the image blur detection sensor is a gyro sensor. 9. The image blur prevention according to claim 1, wherein the interchangeable lens having the image blur correction optical system further comprises an identification unit indicating that the image blur correction optical system is included. SLR camera system. 10. The image stabilizing single-lens reflex camera system according to claim 9, wherein the identifying means is digital information stored in a ROM. 11. The image stabilizing single-lens reflex camera system according to claim 9, wherein the identifying means is a terminal provided on the lens mount portion.