Cavision 77 to 82mm Threaded Step-Up Ring

This Cavision 77-82mm Step-Up Ring enables the use of 82mm threaded filters on lenses with 77mm filter threads. The 12mm 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 an 85mm outside diameter for use with clip-on matte boxes. It features a lightweight aluminum alloy construction with a black anodized finish.