Helios-44
Zeiss Biotar optical formula
Helios-44 is a Soviet copy of the Carl Zeiss Biotar 58mm ƒ/2 lens produced under the Helios lens brand. The Lens is currently made in Russia for the M42 lens mount.
Specification
- Distance scale: 0.5 m to ∞
- Aperture: f/2 - f/16
- Focal Length: 58 mm
- Mount: M42, Pentax-K, Zenit-D
- Mount thread for Attachments: M42 x 0.75
- Weight: 230 g
- Resolution: 50/30 lines per millimeter
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