NIKKOR-O 1:4 f=2.1cm No.225015
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- «Nippon Kogaku Japan»
- production year 1965
- 15th lens produced (first Nikkormat compatible 2.1cm lens was No.225001)
- 8 elements in 4 groups, picture angle 91°
- black front ring, filter ∅ 52mm
- aperture scale f/4 to f/16, 7 iris blades
- infrared mark: red dot and red «R»
- distance scale graduated in meters only from 0.9m to infinity (∞)
- «LENS MADE IN JAPAN» on chrome focusing ring («M» with slanted sides)
- bayonet without recess, no bayonet screws
- narrow rear bayonet collar fits Nikkormat
- dimensions approx. 60mm ∅ x 56mm
- weight approx. 160g
- NIKKOR 52mm snap-on front lens cap
- NIPPON KOGAKU 3F rear lens cap
- NIPPON KOGAKU F 2.1cm viewfinder 204062
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