The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1993
Filed:
Apr. 15, 1991
Applicant:
Inventor:
Naoki Takahashi, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354413 ; 354417 ; 354420 ; 3541451 ;
Abstract
A camera system consisting of a flash device and a camera of the kind performing the so-called TTL flash control action is arranged to permit manual setting of a correction degree for the TTL flash control; to adjust the degree of light quantity control according to the correction degree in performing the TTL flash control; and, when the camera is set into a specific mode, to automatically shift the correction degree to zero to inhibit the light quantity control degree from being changed by the correction degree even if the correction degree has been manually set.