Olympus E.Zuiko Auto-T 100mm f2.8 lens mount_Mamiya 7 although with better optics This

although with better optics This is a showpiece lens

the camera end is a standard F mount but practical compatibility will depend on the shape of your camera (some bulkier AF and digital cameras will require an additional extension tube- not included- to clear the back of the rail)

The Rokinon XEEN 24mm T1

which someone has attempted to remove with the wrong tools at some point

Olympus E.Zuiko Auto-T 100mm f2.8 lens mount_Mamiya 7 although with better optics ThisThe Olympus E. Zuiko Auto T 100mm f2. 8 is a compact short telephoto lens for Olympus OM mount cameras. In excellent cosmetic condition, with smooth focusing, good diaphragm, some internal dust.