Nauticam RC1635II-Z Zoom Gear ~for Canon EF 16-35mm f/2.8L II 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 16-35mm f/2.8L II USM lens.