Patent ID: 6480681
Filing Date: 2002-11-12
Classification: G02B

Abstract:
An adjustable viewfinder optical system for a shoulder-supported camera having interchangeable objective lenses, the system comprising:a first lens group aligned on a system optical axis for receiving and relaying an image received from the camera objective lens to an exit of said first lens group, said first lens group producing collimated light rays of the image at said exit, said exit and collimated light rays being along a first optical axis portion of said system optical axis that is in a first plane parallel to an optical axis of the objective lens; a second lens group having a portion aligned on said first optical axis portion for receiving the collimated light rays of the image from said first lens group and relaying the image to an eyepiece lens group on a second optical axis portion of said system optical axis for viewing the image, said second optical axis portion being in a second plane parallel to and spaced from said first plane; and said second lens group being telescopically movable on said first optical axis id portion relative to said first lens group with said image remaining in focus as viewed through said eyepiece lens means throughout the telescopic relative movement of said first and second lens groups.