Cavision 43 to 55mm Threaded Step-Up Ring

This Cavision 43-55mm Step-Up Ring enables the use of 55mm threaded filters on lenses with 43mm 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 58mm outside diameter for use with clip-on matte boxes. It features a lightweight aluminum alloy construction with a black anodized finish.