Sigma EX 15mm f2.8 Fisheye for Nikon F lens mount_LTM It's 80 year old Bakelite

It's 80 year old Bakelite

Because this is a D-type lens

Best news of all: this shoots standard 120 film

The Asahi Super-Multi-Coated Takumar 6x7 300mm f4 is a telephoto lens for the Pentax 67 medium format SLR system

Sigma EX 15mm f2.8 Fisheye for Nikon F lens mount_LTM It's 80 year old BakeliteThe Sigma EX 15mm f2. 8 Fisheye is a full frame fisheye lens for Nikon F mount cameras. Surprisingly compact, this lens will mount to any Nikon SLR camera, film or digital: because it has a manual aperture ring, you can use it on any film camera from the F on up, and its electronic contacts make the newest DSLRs happy. Autofocusing requires a camera with an in body motor, but honestly, its a fisheye lens: almost everythings in focus 90% of the time,