Helios 40-2 Russian 85mm M42 lens

Helios 40-2 Russian 85mm M42 lens
Product description

Helios-40-2 lens history Six lens enlightened, over aperture anastigmat slightly increased compared with the normal lens focal length. Equipped with iris diaphragm and ring pre-install it. Helios-...

Helios 40-2 lens history

Helios 40-2 lens - Six lens enlightened, over aperture anastigmat slightly increased compared with the normal lens focal length. Equipped with iris diaphragm and ring pre-install it.

Helios 40-2 lens description

  • Angle of view - 28 ° ',
  • Focal Length - 85 mm (85.18 mm),
  • Relative aperture - 1:1,5.
  • Frame size - 24x36 mm,
  • Number of lenses / groups - 6 / 4
  • Front vertex focal distance - -26.85 mm
  • Rear vertex focal length - 44.52 mm .
  • Distance from first to last the surface - 81.53 mm
  • Light diameter of the first surface - Ø56, 9 mm;