Nikkor 85mm f/1.8 H non-AI (classic non-AI '64-'72, multicoated non-AI '72-'75, K non-AI '75-'77)
This sample circa '70, factory AI conversion.
Filter size: 52mm
Close focus distance: 3.3 feet or 1 meter (the later K version focuses down to 2.8 feet or 0.85 meters)
Aperture range: f/1.8 - f/22
Aperture blades: 6
Depth of field scale for f/8, 16, 22 plus IR focusing index.
Design: 6 elements in 4 groups
Early versions (the first 7200 or so) have the identity ring inside the filter ring.
Later Nippon Kogaku, Nikon and C versions have the identity information on the outside of the lens barrel. The C version is pretty uncommon, with around 13000 made.
The later K version focuses a little closer, to 3 feet / 0.85 meters.
Richard de Stoutz
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