NIKKOR-Q Auto 1:4 f=20cm No.169754
- «Nippon Kogaku Japan»
- Production year 1961
- 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 lens barrel
- Scalopped focusing ring
- distance scale graduated in meters from 3m to infinity (∞)
- No «LENS MADE IN JAPAN» engraving
- Black «PAT.PEND.» engraving on chrome lens barrel
- 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
- NIPPON KOGAKU 52mm snap-on front lens cap
- NIPPON KOGAKU F rear lens cap
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