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Patent Searching and Data


Title:
CONVERSION ADAPTER DEVICE FOR INTERCHANGEABLE LENS SYSTEM
Document Type and Number:
Japanese Patent JPH04273232
Kind Code:
A
Abstract:

PURPOSE: To execute appropriate automatic exposure control(AE) to various kinds of lenses by providing plural data converting tables for generating driving information and selecting them based on information from a camera side.

CONSTITUTION: Information for controlling the AE is generated in a camera unit CM, and the data for controlling the AE(relative difference data) is converted into data on an absolute stop difference which can be used by a lens unit LS by a microcomputer 17 for conversion in a conversion adapter AD. The tables for conversion are provided, and these tables and the conversion tables which are matched so that the AE control can be previously and appropriately executed when the camera performs various kinds of functions are plurally provided in the conversion table group 15 of the microcomputer 17. Then, the excellent AE control is executed by selecting and using a conversion method which is previously matched and adjusted so that the control appropriate for the control is executed even in the case that the AE control is affected by the control state of the camera.


Inventors:
Ota, Seiya
Mabuchi, Toshiaki
Application Number:
JP1991000034768
Publication Date:
September 29, 1992
Filing Date:
February 28, 1991
Export Citation:
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Assignee:
CANON INC
International Classes:
G03B17/14; H04N5/225; H04N5/232; (IPC1-7): G03B17/14; H04N5/225; H04N5/232