SC1020 Z Zoom Gear for Sigma AF 10-20mm F4-5.6 EX DC HSM Lens - Compatible with Sigma Wide Angle Lenses for DSLR Photography, Landscape & Architecture Shots

Focus gears allow access to the mechanical zoom function of many lenses. Use of these gears may require specific port extensions and may not be available for all housings and lenses.

This focus gear is specific for the Sigma 10-20mm F4-5.6 EX DC HSM lens.