This Cavision 72-72mm Step-Up Ring permits the use of 72mm threaded filters on lenses with 72mm filter threads. Additionally, the 8mm depth of this ring provides more surface area than a standard step-up ring. This provides a more secure grip to the clamp of your Cavision Clamp-On Matte Box. The step-up ring features a lightweight, aluminum-alloy construction that has a black anodized finish.
This adapter ring features 8mm depth, which provides a generous clamping surface for a clip-on matte box to grab onto.