The Zenit E was a Russian-built SLR camera body for M42 screw lenses, made from 1965-1968. The Zenit range was quite popular since it was priced moderately and it was offered under several other trademarks or brands (Kalimar, Revueflex, Prinzflex, Photokina, Spiraflex, Cosmorex). The camera offered fixed 1/30, 1/60, 1/125, 1/250 and 1/500 shutter speeds. It also had manual control for long duration exposures. Focusing was done either by the optimal image sharpness in the viewfinder or simply setting the distance in the distance scale. The distance scale was drawn against the calculator scale, showing the acceptable tolerance, depending on aperture. The minimal focusing distance was about 0.65m with the Industar 50 (50mm f3.5) objective (and 0.46m with the Helios-44 58mm f2) but a set of rings was manufactured for this camera, allowing to do the close distance macro pictures.