Lock Ring for Sigma Sports 500mm f/5.6 DG DN OS, Sports 150-600mm f/5-6.3 DG DN OS, Olympus M.Zuiko Digital ED 150-600mm f/5-6.3 IS lens.

A lock ring is included with every lens hood order if required by the lens hood.
Lock Ring for Sigma Sports 500mm f/5.6 DG DN OS, Sports 150-600mm f/5-6.3 DG DN OS, Olympus M.Zuiko Digital ED 150-600mm f/5-6.3 IS lens. Compatible with Zemlin Photo HZ-1034 Series Hoods. Approximate weight: 15g. Order only as a replacement or if using a hood on multiple lenses.