Nikon 105mm f2.5 Nikkor-P Auto (pre AI) lens mount_Hasselblad F with an expandable bottom to

with an expandable bottom to accommodate longer lenses

but pinhole stuff has always been a bit DIY

A late model in Tamron's legendary (and now ¿¿discontinued

it’s yellow

this is definitely something weird

Nikon 105mm f2.5 Nikkor-P Auto (pre AI) lens mount_Hasselblad F with an expandable bottom toThe Nikon 105mm f2. 5 Nikkor P Auto is a classic short telephoto lens that's ideal for portraits, with its smooth rendering and fast f2. 5 aperture. In excellent condition, with minor paint and finish wear, including a tiny ding on the barrel. Clean glass, smooth focusing, good diaphragm. Please note: this is a pre AI lens and compatibility may vary on newer cameras. Check your camera's instruction manual to be sure.