Document Type and Number:
Japanese Patent JPH0216341
Kind Code:
Y2
Abstract:
In the single lens reflex camera including a photographic system having an objective lens and an image detector, and a viewfinder optically disposed of the photographic system and comprising a focusing screen having a transparent area surrounded by a light diffusing area, a prism for changing the direction of an optical path, and an eye-piece in sequence from the object, a light receiving element for light measuring is positioned away from an optical axis of the viewfinder in rear of an image forming lens for converging the light from the focusing screen to the light receiving element, and is provided with a mask for blocking the main part of an image of the transparent area which is formed by the image forming lens, thereby the proportionality between the variation of F-number of the objective lens and the amount of light measured is improved.
Application Number:
JP13945183U
Publication Date:
May 07, 1990
Filing Date:
September 08, 1983
Export Citation:
International Classes:
G03B7/099; G03B7/0997; G03B19/12; (IPC1-7): G03B7/099
Next Patent: JPH0216342