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Nikkor 55mm f/2.8 AI-S MF

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DESCRIPTION

1. Aperture range 2.8-32 and 1:2.8 aperture ratio
2. Automatic diaphragm type
3. 43 degrees picture angle

6 elements in 5 groups
Closest Marked Focusing Distance [m] 0.25
Filter Attachment Size [mm] 52
Dimensions: Dia x Length (extension from lens mount), [mm] 63.5 x 62
Weight [g] 290
Working distance 210mm

LEGEND
AI-SA variant of AI designed to be used with Program and Shutter-priority exposure modes (1982). Manual focus lens. Distinguished by smallest aperture being printed in orange and a small scoop on the bayonet flange, which transmits aperture info. Otherwise same as AI
MFManual Focus

by Ken Rockwell, Test Review
http://www.kenrockwell.com/nikon/55f28ais.htm