# US 12,007,683 B2 · Camera body, camera accessory, and information transmission method

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- Number: US 12,007,683 B2
- Document ID: US12007683B2
- Status: Granted
- Kind: B2
- Application number: 17/260,321
- Filed: 2019-07-12
- Published: 2021-09-23
- Granted: 2024-06-11
- Earliest claimed: 2018-07-20
- Assignees: Nikon Corporation
- Applicants: Nikon Corporation
- Inventors: Sueyuki Ohishi
- Web page: https://patentgrep.com/patent/US12007683B2

## CPC

- G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing
- G03B 5/04: Vertical adjustment of lens; Rising fronts
- G03B 3/10: Power-operated focusing
- G03B 13/36: Autofocus systems
- G03B 17/02: Bodies
- G03B 17/14: interchangeably
- H04N 23/667: Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
- H04N 23/6812: {based on additional sensors, e.g. acceleration sensors}
- H04N 23/687: {by shifting the lens or sensor position}
- G03B 2205/0007: Movement of one or more optical elements for control of motion blur
- G03B 2205/0015: by displacing one or more optical elements normal to the optical axis
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A camera body with which it is possible to improve the effect of shake correction, a camera accessory, and an information transmission method. The camera body of the present invention is a camera body to which a camera accessory can be detachably mounted, and is provided with: a movable section which is movable to correct shaking of the camera body; a detection unit which detects the shake and outputs a detection signal; a calculation unit which, on the basis of the detection signal, calculates an amount of movement of the movable section; and a transmission unit which transmits, to the camera accessory, body-side information the calculation unit uses to calculate the amount of movement.

## Claims

### Claim 1

A camera body to which a camera accessory is detachably mounted, the camera body comprising:
a detection unit that detects blurring and outputs a detection signal;
a movable unit that is movable to correct image blurring generated by the blurring;
a calculation unit that calculates a moving distance of the movable unit based on the detection signal and a state of the blurring;
a determination unit that determines the state of the blurring using the detection signal; and
a transmission unit that transmits, to the camera accessory, information indicating the state of the blurring used by the calculation unit when the calculation unit calculates the moving distance using the state of the blurring determined by the determination unit.

### Claim 2 (depends on 1)

The camera body according to claim 1, further comprising
a receiving unit that receives an accessory-side blurring state obtained by determining a state of blurring detected in the accessory,
wherein, when the calculation unit calculates the moving distance using the accessory-side blurring state, the transmission unit transmits, to the camera accessory, information indicating that the calculation unit uses the accessory-side blurring state.

### Claim 3 (depends on 1)

The camera body according to claim 1, wherein a frequency band of the detection signal for use in calculating the moving distance varies depending on the state of the blurring.

### Claim 4 (depends on 1)

The camera body according to claim 1, wherein the state of the blurring includes any one of a state of being fixed by a tripod, a state of being changed in composition, and a state of stable composition.

### Claim 5 (depends on 1)

The camera body according to claim 1, wherein strength and weakness in mobility of the movable unit varies depending on the state of the blurring.

### Claim 6

A camera accessory to which a camera body is detachably mounted, the camera accessory comprising:
a detection unit that detects blurring and outputs a detection signal;
a movable unit that is movable to correct image blurring generated by the blurring;
a calculation unit that calculates a moving distance of the movable unit using the detection signal and a state of the blurring;
a determination unit that determines the state of the blurring using the detection signal; and
a first communication unit that receives, from the camera body and as information indicating the state of the blurring used by the calculation unit, a body-side blurring state obtained by determining a state of blurring detected in the camera body.

### Claim 7 (depends on 6)

The camera accessory according to claim 6, wherein the calculation unit determines a frequency band to be removed from the detection signal based on information indicating a setting of a correction.

### Claim 8 (depends on 6)

The camera accessory according to claim 6,
wherein the first communication unit receives the body-side blurring state obtained by receiving information indicating use of the state of the blurring determined by the determination unit, as information indicating setting of a correction used by the calculation unit.

### Claim 9 (depends on 6)

The camera accessory according to claim 6, further comprising
a second communication unit that transmits the state of the blurring determined by the determination unit to the camera body.

### Claim 10 (depends on 9)

The camera accessory according to claim 9, wherein
the first communication unit performs bidirectional communication with the camera body, and
the second communication unit is independent from the first communication unit and performs periodic single-way communication to the camera body.

### Claim 11 (depends on 6)

The camera accessory according to claim 6, wherein the calculation unit multiplies the detection signal using information indicating setting of a correction.

### Claim 12

A method of transmitting information between a camera accessory detachably mounted to a camera body and the camera body, the method comprising:
the camera body detecting blurring of the camera body and outputting a detection signal;
the camera body determining a state of the blurring of the camera body based on the detection signal detected by the camera body;
the camera accessory detecting blurring of the camera accessory and outputting a detection signal;
the camera accessory determining a state of the blurring of the camera accessory based on the detection signal detected by the camera accessory;
the camera accessory performing control of blur correction using the detection signal and either (i) the state of the blurring of the camera body or (ii) the state of the blurring of the camera accessory; and
information indicating the state of the blurring used by the camera accessory in performing control of blur correction is transmitted from the camera body to the camera accessory.

### Claim 13

A camera accessory to which a camera body is detachably mounted, the camera accessory comprising:
a detection unit that detects blurring and outputs a detection signal;
a movable unit that is movable to correct image blurring generated by the blurring;
a calculation unit that calculates a moving distance of the movable unit using the detection signal and a state of the blurring;
a determination unit that determines the state of the blurring using the detection signal;
a first communication unit that receives, from the camera body, information indicating the state of the blurring used by the calculation unit; and
a second communication unit that transmits the state of the blurring determined by the determination unit to the camera body.

### Claim 14 (depends on 13)

The camera accessory according to claim 13, wherein
the first communication unit performs bidirectional communication with the camera body, and
the second communication unit is independent from the first communication unit and performs periodic single-way communication to the camera body.