NIKKOR-Q Auto 1:4 f=20cm No.176207
- «Nippon Kogaku Japan»
- production year 1962
- first 20cm lens was No.169211
- 4 elements in 4 groups
- picture angle 12°20′
- built-in retractable lens hood with chrome button
- black front ring, filter ∅ 52mm
- Lens data engraved on chrome barrel
- distance scale graduated in meters from 3m to infinity (∞)
- no «LENS MADE IN JAPAN» engraving
- no «PAT.PEND.» engraving
- ribbed aperture setting ring
- aperture scale f/4 to f/22
- 6 iris blades
- no bayonet screws
- dimensions approx. 73mm ∅ x 161.7mm
- weight approx. 560g
- NIKKOR 52mm snap-on front lens cap
- NIPPON KOGAKU F rear lens cap
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