Helios-44M-5 58 mm f/ 2 MC (Russian:Гелиос) ZENIT multicoating m42 mount
 lenses manufactured by Jupiter (Valdai)
6 elements in 4 groups. Optical design type 'Planar' (Planar)
The optical scheme was copied from a Carl Zeiss Jena Biotar 2/58 lens with conversion to Soviet optical glass. Other Helios / Helios 44 2/58 modifications, as well as all Biotar 2/58 modifications, use the same optical design.


Helios-44M-5 58 mm f/ 2 MC Lens
Format: 35mm SLR
Type: Prime lens
Focusing: Manual Focus (MF)
Lens mounts: M42
Optical design: 6 elements in 4 groups
Specifications:
Focal length 58mm
Max. aperture f/2.0
Min. aperture f/16
Blades 6
Min. Focus (m.) 0.5
Filter Ø (mm.) 52
Weight (gr/oz) 270/9,5
Length (mm/in) 42/1,7
Additional information:
The Helios-44M-5 58 mm 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.
Resulution by a technical passport (center/edge): 41/20 lp/mm
Light transition ratio: 0.85
Color formula: 11-0-0

Mechanical quality 4.17
Optical quality 4.33
Usability 3.83
Pricing / Value 4.83
Bokeh 4.50

details see
http://allphotolenses.com/lenses/item/c_822.html

lens all function working well. glass clean and clear, coating good
all metal and glass made.
High Resulution lens