Industar-61 53mm F2.8 Russian Vintage M39 Lens

Industar-61 - standard lens for FED rangefinder cameras. Labeled as 2,8 / 52 2,8 / 53 and 2,8 / 55. Four-lens anastigmat average luminosity with coated optics. Fitted with iris diaphragm. Produced at the Kharkov "FED" factory. The main advantage of the lens is photographic acutance, that allows receiving images of high quality.

Specifications:

• Focal distance: 53 mm
• Diapason of aperrure ratio: 1:2,8-1:16
• Relative aperture: 1:2,8
• Working distance: 28,8 mm
• Angle of view: 46°
• Number of lenses / groups: 4 / 3
• Closest focusing distance: 0,42 m
• Resolution (center / edge): 45 / 28 lp / mm
• Transmittance: 0.85
• Mount: M39x1

SAMPLE PICTURES: