Lock Ring for Nikon Nikkor Z 600mm f/4 TC VR S lens.

A lock ring is included with every lens hood order if required by the lens hood.
Lock Ring for Nikon Nikkor Z 600mm f/4 TC VR S lens. Compatible with Zemlin Photo HZ-43 & HZ-40 Series Hoods. Approximate weight: 27g. Order only as a replacement or if using a hood on multiple lenses.  Photo shows an older 600mm lens with a similar ring.