NIKKOR 20mm 1:4 AI 131824
- «Nikon»
- Production year 1977
- First 20/4 AI lens was #130001
- Picture angle 94°, 10 elements in 8 groups
- Black front ring, filter ∅ 52mm
- Rubber covered focusing ring
- Distance scale graduated in meters and feet from 0.3m (1 ft.) to ∞
- White «LENS MADE IN JAPAN» on black lens barrel («M» with vertical sides)
- Cross ribbed aperture setting ring, AI coupled
- Aperture scale f/4 to f/22, 7 iris blades
- Bayonet fixed by 5 cross-head screws
- Dimensions approx. 63.5mm ∅ x 47.5mm
- Weight approx. 210g
- Nikon 52mm snap-on front lens cap
- Nikon LF-1 rear lens cap
- Nikon HN-14 52mm screw-in lens hood
- Nikon 52mm L37c screw-in filter, black rim
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