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:
Mar. 28, 1978
Filed:
Mar. 10, 1977
Applicant:
Inventor:
Werner Flother, Oberkochen, DT;
Assignee:
Carl Zeiss-Stiftung, Oberkochen, DT;
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G02B / ; G03B / ;
U.S. Cl.
CPC ...
354286 ; 350247 ; 354 38 ;
Abstract
The invention provides a perspective-correction lens with an automatic-diaphragm feature which permits through-the-lens viewing at full brilliance, while also permitting the diaphragm to be set in accordance with photo-electric exposure measurements performed at the body of the camera to which the lens is mounted. Such automatic-diaphragm operation is correctly performed, regardless of the extent or direction of eccentric-offset adjustment of the lens with respect to the camera axis.