This Old Camera: Nikkor 105mm f/2.5 P non-AI

Tuesday, December 30, 2014

Nikkor 105mm f/2.5 P non-AI

Nikkor 105mm f/2.5 P non-AI ('59-'71)
These samples circa '63 and '67.

Filter size: 52mm
Close focus distance: 3 foot or 1.2 meters
Aperture range: f/2.5 - f/32
Aperture blades: 6 (early samples have 9)
Depth of field scale for f/4, f/8 - 16, plus IR focusing index.
Design: 5 elements in 3 groups

This version with the silver front ring and thinner focusing ring is a different design than the later version with a black front ring and a larger focusing ring. That design carried over to AI and AI-S versions.

This lens is (very rarely) available as a tick-marked lens.

This lens was originally marked 10.5 cm:

Earlier mm-marked samples have ribbed aperture rings.

Later samples have scalloped aperture rings.

Here's the older design (silver front) versus the newer design (black front). You can see the older design has a larger front element and smaller rear element. Unfortunately many online stores do not distinguish between them.