Canon EF815L L-Series Zoom Fisheye EF 8-15mm f/4L Lens. The EF 8-15mm f/4L Fisheye Lens is an L-type fisheye zoom lens that goes further by being the world’s first real fisheye zoom lens that functions as a circular fisheye and full-frame fisheye for full size, and as a full-frame fisheye for APS-C/H sizes. Coupled with excellent dust and waterproofing characteristics with high durability and quality makes this an ultra-high performance fisheye zoom lens.
This 8-15mm f/4 also sports a ring-type USM mechanism to enable quick, quiet, and accurate autofocus performance, as well as full-time manual focus override. Additionally, this lens is weather-sealed and has a protective fluorine coating on the exposed elements for use in trying environmental conditions.