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Camera system, camera body, and interchangeable lens

a technology of interchangeable lenses and camera systems, applied in the direction of cameras, instruments, printers, etc., can solve the problem of not revealing an improvement in the accuracy of focus information itself, and achieve the effect of improving the accuracy of the contrast autofocus operation of the lens-interchangeable camera system during recording a moving image and relatively easy control of the focus lens

Inactive Publication Date: 2012-07-19
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The patent text describes a lens-interchangeable camera system that improves the accuracy of autofocus during recording of a moving image. This is achieved by transmitting a timing signal and a drive information signal from the camera body to the interchangeable lens, which allows the lens to accurately focus on the subject image. The technical effect is improved autofocus accuracy, resulting in higher quality moving images."

Problems solved by technology

It does not disclose an improvement in the accuracy of focus information itself that is obtained by the contrast method.

Method used

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  • Camera system, camera body, and interchangeable lens
  • Camera system, camera body, and interchangeable lens
  • Camera system, camera body, and interchangeable lens

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first embodiment

[0020]1-1. Configuration

[0021]1-1-1. Overview

[0022]FIG. 1 is a block diagram showing a configuration of a camera system according to embodiments of the present invention. A camera system 1 includes a camera body 100 and an interchangeable lens 200 mountable to the camera body 100. The camera system 1 can perform an autofocus operation in a contrast method, based on image data generated by a CCD image sensor 110.

[0023]1-1-2. Configuration of the Camera Body

[0024]The camera body 100 includes the CCD image sensor 110, a liquid crystal display (LCD) monitor 120, a camera controller 140, a body mount 150, a power supply 160, and a card slot 170.

[0025]The camera controller 140 controls the entire operation of the camera system 1 by controlling components such as the CCD image sensor 110 in response to an instruction from operation members such as a release button 130. The camera controller 140 transmits a vertical synchronizing signal to a timing generator 112. In parallel with this, the ...

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PUM

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Abstract

A camera system includes an interchangeable lens and a camera body. A body controller in the camera body performs control to transmit a timing signal and a drive information signal to the interchangeable lens. A lens controller in the interchangeable lens controls drive of a focus lens based on the drive information signal and the timing signal which are received from the camera body. The drive information signal includes information of a driving time which is a period from a start of driving the focus lens until an end of driving the focus lens.

Description

BACKGROUND[0001]1. Technical Field[0002]The technical field relates to a lens-interchangeable camera system, and more particularly to a camera system capable of performing an autofocus operation in a contrast detection method during capture of a moving image.[0003]2. Related Art[0004]JP-A-2003-295047 discloses autofocus control that employs both a phase-difference detection method and a contrast method. An imaging apparatus disclosed in JP-A-2003-295047 corrects focus control information obtained by the phase-difference detection method, based on focus information obtained by the contrast method. Specifically, correction information for compensating for insufficient detection accuracy of the phase-difference detection which has excellent high-speed performance is obtained based on information indicating a focus status obtained by using contrast detection which enables focus determination at high accuracy. This arrangement can provide focus control by the phase-difference detection m...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G03B13/36
CPCG03B13/36G02B7/102
Inventor SHIBUNO, KOJIOKAMOTO, MITSUYOSHIKITAHIRA, NAOTAKE
Owner PANASONIC CORP
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