The Helios 44M-6 58mm f/2 MC (Russian: "Гелиос") is a fast standard lens with a fixed focal length for 35mm cameras with M42 screw mount.
Lens has a multicoating.
With a special adapter can be attached to modern dSLR and mirrorless cameras.
This lens was based on Biotar 2/58 (Carl Zeiss Jena) lens.
Helios 44M-6 58mm f/2 MC was being manufactured at "Jupiter" factory in Valday.
Resolution by a technical passport (center/edge): not less than 45/25 lp/mm
Light transition ratio: 0.90
Geometrical vignetting: 58%
Color formula: 11-0-0
Aperture ring has a half-way positions (F2-F11).
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Posted by: SharkDD Date of publication: 18.05.2011