Lock Ring for Canon RF 200-800mm f/6.3-9 IS USM lens.

A lock ring is included with every lens hood order if required by the lens hood.
Lock Ring for Canon RF 200-800mm f/6.3-9 IS USM lens. Compatible with Zemlin Photo HZ-101 Series Hoods. Approximate weight: 14g. Order only as a replacement or if using a hood on multiple lenses.