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:
Nov. 04, 2003
Filed:
Mar. 13, 2002
Bernd Harand, Wetzlar, DE;
Antje Brethauer, Wetzlar, DE;
Leica Camera AG, Solms, DE;
Abstract
A variable viewfinder, for wide-angle camera shots includes three lens units. The first and third lens units, in the light direction, have negative refractive power whereas the second unit has positive refractive power. The lens units are arranged displaceably relative to one another, for changing the viewfinder magnification, in a telescope housing that includes an adaptor for insertion into a flash shoe on the camera. The first and third lens units are fixed in the telescope housing and the second lens unit is arranged in a variator that can be displaced in the telescope housing. The variator includes at least one guide pin which, through a curved track arranged in the telescope housing, engages in a longitudinal groove that runs parallel to the longitudinal axis of the telescope housing. In addition, the variator is provided in a rotating ring pushed onto the telescope housing.