Helios-44K-4 58 mm f/ 2 Lens

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Mechanical quality 4.50
Optical quality 4.33
Usability 4.17
Pricing / Value 5.00
Bokeh 4.50
Overall lens rating 4.50
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Helios-44K-4 58 mm f/ 2 optical design
Format: 35mm SLR
Type: Prime lens
Focusing: Manual Focus (MF)
Lens mounts: Pentax K
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) 258/9,1
Length (mm/in) 42/1,7

Additional information:
The Helios-44K-4 58 mm f/ 2 (Russian: "Гелиос") is a fast standard lens with a fixed focal length for 35mm cameras of a Pentax K system.

Resolution by the lens technical passport (center/edge): 42/21 lp/mm
Light transition ratio: 0.85
Geometric vignetting: 58%
Color formula: 11-0-0
read more:
http://allphotolenses.com/lenses/item/c_807.html

All good glass and steel made
All function good in working.