Nikkor 45mm f/2.8 GN non-AI (1968-1977, this sample circa '71)
Filter size: 52mm
Close focus: 3 feet/0.8 meters
Aperture range: f/2.8 - f/32
Aperture blades: 7
No depth of field scale!
Design: 4 elements in 3 groups (Tessar)
More information: Dante Stella
Comments: This is a weird lens for many reasons. I don't use flash much, so I leave the linkage between the focus distance and the aperture off. It focuses backwards compares to other Nikkors, and the `pacing' is backwards too (a lot of rotation from infinity to 10 feet and very little from 10 feet to 3 feet, because that whole inverse square law thing). It also is missing a lot of the standard features of a lens from this era - no depth of field or IR info. It is however cute and tiny and a good performer, but the close focus is lacking.