Earlier cameras of this type had separate viewfinder and rangefinder windows later the rangefinder was incorporated into the viewfinder. Older, non-coupled rangefinder cameras display the focusing distance and require the photographer to transfer the value to the lens focus ring cameras without built-in rangefinders could have an external rangefinder fitted into the accessory shoe. Most varieties of rangefinder show two images of the same subject, one of which moves when a calibrated wheel is turned when the two images coincide and fuse into one, the distance can be read off the wheel. A Foca camera of 1947 at the Musée des Arts et Métiers in Paris.Ī rangefinder camera is a camera fitted with a rangefinder: a range-finding focusing mechanism allowing the photographer to measure the subject distance and take photographs that are in sharp focus.
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