NIKKOR-O 1:4 f=2.1cm No.220235

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• «Nippon Kogaku Japan», production year 1959
• 125th lens produced (first 2.1cm lens was No.220111)
• Black front ring, filter ∅ 52mm
• 8 elements in 4 groups, picture angle 91°
• Aperture scale f/4 to f/16, 7 iris blades
• Infrared mark: red dot and red «R»
• Distance scale graduated in feet from 3 ft. to infinity (∞)
• No «LENS MADE IN JAPAN» engraving
• No «PAT.PEND.» engraving
• Bayonet with recess, no bayonet screws
• Large rear lens collar
• Dimensions approx. 60mm ∅ x 56mm
• Weight approx. 165g
• NIPPON KOGAKU 52mm snap-on front lens cap
• NIPPON KOGAKU 3F rear lens cap
• NIPPON KOGAKU F 2.1cm viewfinder 200166
• NIPPON KOGAKU F 52mm screw-in lens hood, «f=2.1cm 1:4»
• Nikon 52mm L38 screw-in filter, chrome rim

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