Reflection photometer for single-lens reflex camera

Abstract

Abstract PURPOSE:To obtain photometry outputs which are similar to photometries of directly reflected lights of films, by receiving images and performing photometries on images formed at the location of the diffuse reflection plate which is conjugate with the film, by the image forming lens and the diffuse reflection plate. CONSTITUTION:Lights of subject passing through a photo taking lens 29 of a single-lens reflect camera form images at a location which is conjugate with a film 28 of a diffuse refletion plate 27 by a condenser lens 25 installed to a movable mirror 22. These image forming lights are reflected by the reflection plate 27 and received by a light receiving element 31, and then the photometry is performed. In this way, automatic exposure controls, etc., are easily and correctly performed, because photometry outputs which are similar to photometries by directly reflected lights of the film are obtained.

Inventors

• 👤 Takashi Kodama

Bibliographic Details