Industar-61L / D 2.8 / 55 Normal high-aperture lens with coated optics for rangefinder cameras.
Focal length: 55mm
Field of view: 46 °
Frame size: 24 × 36 mm
Number of lenses / groups: 4/3
Working distance - 28.8 mm
Aperture ratio: 1: 2.8
Aperture scale limits: 1: 2.8–1: 16
Aperture blades: 6
Iris Adjustment: Fixed
Aperture preset: none
Near focusing limit - 1 m
Connections:
lens with camera - M39 × 1
for screw-in bits - M40.5 × 0.75
for slip-on attachments - ∅42 mm
Filter Mount Location: Front
Resolution according to TU (center / edge): 44/30 lines / mm
Light transmittance: n / a
Weight - 131 g