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:
Jun. 08, 1982
Filed:
Apr. 01, 1980
Yasumasa Tomori, Sakada, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A zoom lens including a change-over device or mechanism for changing between a normal photographing mode and a macro photographing mode and in which zooming and focusing operations for normal photographing are carried out with a single operational barrel while focusing and zooming for the macro photographing mode are carried out with a second or macro photographing operational barrel. A change-over rod is slidably mounted on a support barrel which supports each of four lens groups. The change-over rod is selectively engageable and disengageable from the normal operational barrel and a macro operational barrel. When the change-over rod is engaged with the normal operational barrel for macro photographing, rotation of the normal operational barrel is prevented and each of the lens groups are moved integrally with one another. In the other position of the change-over rod in which the end thereof is disengaged from the normal operational barrel, focusing and zooming are carried out by operating the normal operational barrel.