This Cavision 30.5-37mm Step-Up Ring enables the use of 37mm threaded filters on lenses with 30.5mm filter threads. The 6mm depth enables this ring to fill the gap between the lens and the back of select rod-mounted matte boxes, helping to keep reflections from hitting your lens. The step-up ring has a 40mm outside diameter for use with clip-on matte boxes. It features a lightweight aluminum alloy construction with a black anodized finish.
Use alone or with select matte boxes
This adapter ring features a depth of 6mm, suiting it for reflection prevention use with rod-mounted matte boxes
Lightweight, durable anodized aluminum construction