NIKKOR-S Auto 1:2.8 f=3.5cm No.920157:
- «Nippon Kogaku Japan»
- production year 1960/61
- Duplicate serial number (indicated by the colon following the serial number)
- First 3.5cm lens without tick marks was No.920157:)
- 7 elements in 5 groups
- Picture angle 62°
- Chrome front ring, filter ∅ 52mm
- Distance scale graduated in meters and feet from 0.3m (1 ft.) to infinity (∞)
- «LENS MADE IN JAPAN» on chrome lens barrel («M» with slanted sides)
- «PAT.PEND.» on chrome lens barrel
- Aperture scale f/2.8 to f/16
- 9 iris blades
- No bayonet screws
- Dimensions approx. 62mm ∅ x 68 mm
- Weight approx. 200g
- NIPPON KOGAKU 52mm snap-on front lens cap
- NIPPON KOGAKU F rear lens cap
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