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:
Apr. 03, 1979
Filed:
Nov. 04, 1977
Applicant:
Inventors:
Masaichi Shimomura, Sakai, JP;
Mitsuaki Horimoto, Osaka, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350184 ;
Abstract
A wide angle zoom lens system for use with a 35 mm single lens reflex camera is provided. The zoom lens system is relatively compact and includes two lens groups that can be relatively displaced along the optical axis to provide variation in focal length as desired. The first lens group has a negative refractive power and the image side second lens group has a positive refractive power. The relationship of their refractive powers has been selected to provide adequate correction of aberrations while maintaining the size, weight and compactness required in a modern zoom lens system with wide angle capability.