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:
Sep. 12, 1978
Filed:
Dec. 05, 1977
Applicant:
Inventors:
Sadahiko Tsuji, Kanagawa, JP;
Yujiro Agari, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350184 ;
Abstract
The present invention relates to a macro zoom lens capable of taking a close up photograph at the one end at which a wide lens effect is obtained and at the other end at which a telephoto lens effect is obtained. One or two groups of the movable lenses in the zoom lens move in a movable direction along the optical axis at the one end at which a wide lens effect is obtained. At the other end, a telephoto lens effect is obtained. The distance between each lens and its next lens in the zoom lens in the ordinary zooming state is small as compared with the distance between the corresponding lenses at the time of taking a close up photograph.