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Helios-40 (Kiev)


PT6905. Prototype lens, calculated in 1950 by GOI. Very few samples released by GOI in 1950-1951. Focal length - 8.5 cm, aperture range f1.5 - f22. Focusing range from 1 m to infinity. Number of elements/groups: 6/4.  Angular field - 28º. Kiev (Contax) mount. 

Sample opposite from GOI Catalogue (1963).


PT6905 - Helios-40 prototype lens.