GB762641A - Twin-lens reflex camera - Google Patents

Abstract

762,641. Photographic cameras. STEINECK, R. Aug. 18, 1954, No. 24105/54. Class 98(1) In a twin lens reflex camera which can be attached to the wrist, the focusing aperture is located in the upper face of the case and is approximately parallel to the plane of the film 25 in the exposure aperture to which light is reflected by a mirror 23 the plane of the film being parallel to the axes of taking lens 17 and viewing lens 18. Preferably, the axis of the viewing lens 18 is closer to the plane of the film than the axis of the taking lens 17 and mirrors 19. 23 are trapezoidal and are arranged with their shorter edges nearer the lenses and their longer focusing edges nearer a ground-glass screen 20 in the aperture and film 25, respectively. The lenses may be arranged in a single mounting 3 and may be interchangeable or they may be of different focal length. Sprocket 33 is coupled to shutter 34 so that the shutter is set as the film is advanced. The exposed film is wound on spool 28. A viewing lens 21 may be provided and the ground-glass screen may be adjustable for focusing. Alternatively the lens 21 may replace the ground-glass screen. The lens mounting 3 may be at a fixed distance from the image receiving surfaces and focusing may be effected by adding supplementary lenses, with or without colour filters. A spirit-level may be attached to the camera and a presser plate 30 having a spring 31 may be provided.