Patent ID: 6141501
Filing Date: 2000-10-31
Classification: G02B

Abstract:
A finder device for use with a camera, said finder device comprising:an objective optical system;a finder frame; and,an eyepiece;whereinsaid finder frame has an aperture therein to pass light from said objective optical system to said eyepiece, said finder frame including two support pins, one positioned opposite the other, with said aperture positioned between said support pins;a screen format switchable mask is mounted to said support pins so as to enable a particular screen format to be selected from among at least two alternative screen formats, with each screen format having a transparent region within an opaque border;a mask pressure plate which is mounted to said support pins so as to retain the screen format switchable mask on said support pins; andmarkings, useful for taking photographs, are provided on a transparent region of a field of vision frame that is positioned within said aperture of the finder frame, or are provided on said mask pressure plate, so that said markings are visible with an image of an object when the object is viewed through said eyepiece.