Nauticam RC815-Z Zoom Gear ~for Canon EF 8-15mm f/4L Fisheye USM
Zoom gears allow access to the mechanical zoom function of supported lenses. Use of this gear may require the use of additional port extensions or adapters. Check the Port Chart for more details. This zoom gear is for the Canon EF 8-15mm f/4L Fisheye USM lens.