Lock Ring for Sigma 105mm f/1.4 DG HSM Art lens.

A lock ring is included with every lens hood order if required by the lens hood.
Lock Ring for Sigma 105mm f/1.4 DG HSM Art lens. Compatible with Zemlin Photo HZ-1113 Series Hoods. Approximate weight: 21g. Order only as a replacement or if using a hood on multiple lenses.