Which version of the 105/2.5 is this? The original came out ~1954, a Sonnar forumula lens. Around 1971 (or so) Nikon switched it over to a double-Gauss (ish) design. Also picked up multi-coated optics ~1973.
Nikkor 10.5cm F2.5 in LTM, on the M8, wide-open. This one is the type 2 in LTM, dropped the lugs for the bayonet mount Sunshade.
Subscribe to see EXIF info for this image (if available)