Micro Nikkor 55mm f/3.5 P non-AI (preset 61-63, compensating 63-68, non-compensating 68-77, AI 77-79)
This sample circa '68.
Filter size: 52mm
Close focus distance: 9.5 inches or 0.241 meters (1:2)
Aperture range: f/3.5 - f/32
Aperture blades: 6
Depth of field scale for f/5.6, f/11-32, plus IR focusing index.
Design: 5 elements in 4 groups
There are three distinct versions of this lens with the same optics and different mechanics. The first is rare, a preset lens with a 7 bladed aperture which focuses to 1:1. The second is shown here, it has the fluted metal focusing ring and a compensating aperture (if you set it at f/5.6 and focus it down to 1:2 the aperture opens all the way up to compensate for the lost light) which is handy if you are not using a TTL meter as I do. The final has a rubber focusing ring and a non-compensating aperture.
Here are the three versions together:
Here they are at full extension:
Here they are at f/5.6 at 1:2 magnification. Note the one with compensating aperture is not nearly as stopped down, since focusing that close is already losing about a stop of light. Also note the unusual shape of the aperture on the preset version:
Richard de Stoutz
More photos from this lens