Sigma 17-70mm F2.8-4 DC Macro OS HSM Zoom Gear Replacement Part SC1770OSC - Compatible with Sigma Lenses for DSLR Photography | Perfect for Macro, Portrait & Travel Photography

Limited stock is available. 

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 Sigma 17-70mm F2.8-4 DC Macro OS HSM | C (Canon Mount) lens.