The OConnor Reduction Ring (114-80mm) enables a lens with an outside front diameter of 80mm to fit into an OConnor Obox WM Matte Box equipped with a bellows ring (not included). This configuration prevents light from leaking from behind the matte box and flaring filters in front of your lens; this ring is not suitable for use as a clamp-on ring.Snaps into your OConnor O-Box WM matte box outfitted with a bellows ring (not included)Prevents light from behind the camera leaking between your lens and matte box and degrading your image.

• For OConnor O-Box WM Matte Box
• For Lenses with 80mm Outer Barrel
• Requires Additional Bellows Ring