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. 18, 1985
Filed:
Jul. 01, 1983
Yasumasa Tomori, Sakadoshi, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A zoom lens barrel capable of macro-photographing, having lens assemblies with a focusing lens assembly has a mount ring, a zooming ring and a focusing ring. The barrel further comprises a guide means between the mount ring and the focusing ring for enabling the focusing ring not only to rotate for normal photographing, and for macro-photographing, but also to move in the axial direction, a connecting ring which rotates to move only the focusing lens assembly, a macrohelicoid ring which rotates to move the whole lens assemblies while maintaining a predetermined spatial relationship therebetween, and a switching means for selectively connecting the connecting ring or the macrohelicoid ring to the focusing ring in accordance with the axial movement of the focusing ring.