Micro-NIKKOR 1:3.5 f=5.5cm No.173225
- «Nippon Kogaku Japan»
- production year 1962
- type 2
- 525th lens produced (first type 2 5.5cm micro lens was No.172701?)
- 5 elements in 4 groups, picture angle 43°
- fixed raised front ring, black, filter ∅ 52mm
- preset diaphragm
- aperture scale f/3.5 to f/22, 7 iris blades
- distance scale graduated in feet from 0.7 ft. to infinity (∞)
- «LENS MADE IN JAPAN» on focusing ring («M» with slanted sides)
- «PAT.PEND.» on chrome lens barrel
- custom modified with rectangular rear stray light protector from a later Micro-NIKKOR 55mm f/3.5
- bayonet fixed by 3 slot screws
- dimensions approx. 65mm ∅ x 66mm
- weight approx. 315g
- NIPPON KOGAKU 52mm snap-on front lens cap
- NIPPON KOGAKU F rear lens cap
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