Patent ID: 6137957
Filing Date: 2000-10-24
Classification: G02B,G03B

Abstract:
A pseudo zoom camera, which utilizes a film cartridge provided with an information storing means, the pseudo zoom camera comprising:a taking lens optical system for projecting an object image onto a portion of photographic film,a finder optical system capable of displaying an image of a field angle, which is different from the field angle of said object image formed by said taking lens optical system, in a predetermined region representing an image-recording range, the finder optical system comprising a fundamental optical system and at least one movable conversion lens, wherein the conversion lens is constructed to be selectable positioned into or out of alignment with the fundamental optical system,a blackout means for operating to set the finder in a state in which no visual field image is displayed during at least part of a period during which the conversion lens is moved into or out of alignment with the fundamental optical system, anda writing means for writing information representing an image range ratio of the image displayed in said predetermined region by said finder optical system to said object image, said information being written on the information storing means of the film cartridge.