Lock Ring for Sony FE 400-800mm f/6.3-8 G OSS lens.

A lock ring is included with every lens hood order if required by the lens hood.
Lock Ring for Sony FE 400-800mm f/6.3-8 G OSS lens. Compatible with Zemlin Photo HZ-S181 & HZ-S175 Series Hoods. Approximate weight: 27g. Order only as a replacement or if using a hood on multiple lenses.