As a photographer who has lived his whole life in the USSR and Russia, I confirm everything said by my respected RK about the history of Industar-37 lenses. They were really created for everyday use when shooting in numerous photo shops and were little used in amateur photography, since in the Soviet Union a very small number of photographers were fond of shooting large format cameras. It is necessary to add that Industar-37 is an improved version of the older Industar-13 lens. But in addition to the different Industar models that copied the Tessar optical scheme, lenses called LOMO RF with focal lengths of 150, 240, 300,360, 450, 600 and 720mm, which were intended for reproduction works on large format cameras (from 13x18cm to 30x40cm). All these lenses were produced without shutters, many of them had, along with the usual ones, additional insertion diaphragms for lowering light scattering, a “double Gauss” optical scheme, low aperture ratio (usually from 8 to 10) and chemical enlightenment. On their rims there is no APO designation, but in fact they are designed specifically as APO lenses. With a 1: 1 image scale, they give a very sharp image even when the aperture is fully open, and when shooting landscapes, they are quite suitable, especially with apertures from 22 onwards. It is noteworthy that the “double Gauss” scheme allows shooting using only one half (front or rear) of the lens, while the focal length is almost doubled while the aperture is reduced by four times. And for aerial photography, other lenses and cameras are used ...
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