RARE Vintage lens ussr soviet antique LOMO OKS 1-18-1 128/18? Mount OST 18
RARE Vintage lens ussr soviet antique LOMO OKS 1-18-1 1:2:8/18?? The OKS1-18-1 (2.8/18) lens is a high-aperture eight-lens anastigmat. The objective lenses are chemically coated. The lens is designed for professional film cameras using 35mm film. Produced for cameras such as "Konvas-automatic", "Sputnik", "Era".
High luminosity, high resolving power, large depth of field make it possible to use the lens for filming high and stretching architectural ensembles, landscape photography, indoor shooting, for shooting sports, newsreels, genre moments, etc. The optical parts of the lens are mounted in a special frame. Focal length, mm - 18.12. Relative aperture - 1:2.8. Angular field of view, g - 76. Working distance, mm - 29.4. Front focal length, mm - 44.11 Rear focal length. Light transmission coefficient - 0.75.Resolution power, lines / mm. In the center - 64. Along the edge of the field - 27.
Number of lenses - 6. Light diameter of the first surface, mm - 80.4. Light diameter of the last surface, mm - 11. The largest diameter of the frame, mm - 99. Length of the frame with covers, mm - 89.
Connecting thread - SpM 21x0.5. Smooth (diameter), mm - 99.