Asahi Fisheye-Takumar 17mm f4 lens mount_Olympus Pen film or digital

film or digital

or as a precision geared focusing rail

with the most notable being on the front retaining ring

but expands to 1

City folk don't know it's a camera bag

Asahi Fisheye-Takumar 17mm f4 lens mount_Olympus Pen film or digitalThis Asahi Fisheye Takumar 17mm f4 is a tiny, tiny full frame fisheye lens pretty unique. This one is in excellent cosmetic condition, with only very light cosmetic wear. Focusing is smooth, diaphragm moves well, and the built in filters are good. Some of the element edges have a variant of "Schneideritis," with some edge of element artifacts; like classic Schneideritis, it's out of the optical path and won't affect imaging, but it's there. A neat