The Zorki-35M full-frame 35mm coupled-rangefinder camera is from a project undertaken by KMZ designer N. Marienkov during the late 1960s (the "M" is his "signature" camera; he also designed the Zorki 3M and the Zenit 3M). It is based on the body of the Zenit E and some of the advanced design features of the Zenit D, but is a rangefinder rather than SLR camera. It features bright-line frames in the viewfinder for 50mm and 85mm lenses, with the entire field of the viewfinder corresponding to that of a 35mm lens.