Designed for use with the O-Box WM matte box, the OConnor Clamp Ring (150-80mm) fills the space between a lens with a 80mm front barrel and the 150mm diameter of the matte box back. This ring's split design allows for gentle compression for securely fastening the matte box around the ring and lens.

Use this ring to help prevent flares and reflections from any filters from entering the lens.Used with the OConnor O-Box WM matte box150-80mm step-down adapter ring.

• For OConnor O-Box WM Matte Box
• For Lenses with 80mm Outer Barrel
• Split Ring Design