Soviet lens Industar 11M I-11LOMO F = 30cm 1: 9 for FKD USSR
Industar-11M 300mm f/ 9 is a reproduction orthoscopic lens, according to the optical scheme - tessar. It has good correction of chromatic and spherical aberrations. This lens was used in reproduction installations, such as "FG-2M", could be used on large format cameras ("FK", "FKP", "FKD", "FKR"). Equipped with an 18-blade iris diaphragm. Resolution: center/edge (lines/mm) - 35/14 with supported formats - from 9x12 to 30x40 cm. Enlightenment is single-layer chemically. Landing thread SpM 53x0.75.
Additional Information:
Focal length, mm 301.24
Angular field of view 45°
Aperture limits 1:9-1:90
The largest diameter of the frame 76 mm
Anterior focal length 293.37 mm
Posterior focal length 277.45 mm
Light diameter of the first surface 33.5
Light diameter of the last surface 34
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