德潘太康老頭 Pentacon electric mutil coating 50 mm f1.8 Lens M42 色彩深 細節多 高分辨率
合不喜灰平淡鏡之用家
All function good in working.
Format: 35mm SLR
Type: Prime lens
Focusing: Manual Focus (MF)
Lens mounts: M42
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Specifications:
Focal length 50mm
Max. aperture f/1.8
Min. aperture f/16
Blades Min. 6
Focus (m.) 0.33
Filter Ø (mm.)49
Weight (gr/oz) 215/7,6
Length (mm/in) 40/1,6
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Mechanical quality 4.53
Optical quality 4.58
Usability 4.73
Pricing / Value 4.53
Bokeh 4.61
Overall lens rating 4.60

details see
http://allphotolenses.com/lenses/item/c_846.html
and
http://iplaylens.blogspot.hk/2014/06/pentacon-mc-electric-50mm-f18.html#!/2014/06/pentacon-mc-electric-50mm-f18.html