BRIGHT TANGERINE Threaded Adapter Ring for Clamp-On Matte Box (72 to 114mm)

This 72 to 114mm Threaded Adapter Ring for Clamp-On Matte Box from Bright Tangerine is essentially a step-up ring that allows you to mount a clamp-on type matte box to your lens with a filter thread diameter of 72mm. However, this adapter features a rear projecting 114mm ring, as opposed to most other step-up rings that project forward.