A fisheye zoom lens sounds kind of wacky, but then again, it’s pretty handy to have a full range of fisheye effects available with the turn of a ring. ThisCanon EF 8-15mm f4L USM goes from a circular image at 8mm to a full-frame fisheye at 15mm, keeping a constant f4 aperture the whole way. In excellent condition, with clean glass and good function. Includes hood and caps.