the first leica camera having the combined viewfinder/rangefinder eyepiece, and the diopter correction lever for the rangefinder was moved to a different location under the rewind knob. they were also produced for the luftwaffen, german air force, during world war II. "luftwaffen-eigentum" was stamped on the back vulcanite to highlight the ownership of these rare military cameras.

Elmar 50mm f/3.5 was the lens that started 35mm photography. weighs only half as much as a SUMMICRON, has no distortion or finder blockage. 4 elements 3 groups.