Cavision 67 to 77mm Threaded Step-Up Ring

This Cavision 67-77mm Step-Up Ring enables the use of 77mm threaded filters on lenses with 67mm 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 80mm outside diameter for use with clip-on matte boxes. It features a lightweight aluminum alloy construction with a black anodized finish.