Asahi Super-Takumar 35mm f2 Prime Lens and it's fully compatible with

and it's fully compatible with the large Canon EF lens system

Compatible with Pentax TTL film and digital cameras (has both TTL and P-TTL protocols)

in automatic mode the blades jam at various points

and some weather resistance for

Asahi Super-Takumar 35mm f2 Prime Lens and it's fully compatible withThe big "original" 35mm f2 Super Takumar is a lot bigger than you'd expect, with a 67mm front element. A really nice lens, though, with good sharpness and an appealing field curvature when used up close. This lens is in excellent condition, with only minor cosmetic wear, smooth focusing, and good diaphragm. Optics have light dust, but are otherwise clean. Includes original case.