SmallRig Screw-In Reduction Ring with Filter Thread (77-114mm) for Matte Box 2660 3458 is designed for lenses with 77mm thread. It screws onto the front of the lens firmly and features 77mm filter threads outside to add 77mm circular filters such as variable ND and CPL filters on the front of the adapter ring. In addition, the adapter rings are designed with an anti-twist edge to prevent accidental disconnection when used in conjunction with the matte box to ensure safety.

Note: Focal length under 16mm may lead to vignetting.