INDUSTAR 61L/D 2,8/55 M39 Soviet FED Lens Rangefinder Fed Zorki Leica
Staff lens for rangefinder cameras such as the FED, produced at the Kharkov Defense company from 1963 to 1992 (approximately). Where in the name of L / D to be read as lanthanum / Ranging. Industar-61 replaced by a similar optical system Industar-26M.
Focal Length - 55 mm.
Maximum aperture - 2.8.
Minimum aperture - 16.
Number of diaphragm blades - 6 and 10 (at the earliest).
Number of lenses / groups - 4/3.
Minimum focusing distance - 1 m.
The resolving power of the center / edge - 44/30 lines per mm.
Light Transmission - 0.85.
Operating segment - 28.8 mm.
Mounting tips - threaded m40,5.
Mounting optics - M39.
Lens in good working condition . Some have worn the lenses by wiping with a cloth. That does not affect the quality of the photo. No fungus. Glass clean . See photos. All pictures are actual.
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