The Genus Matte Box Lite has a lightweight matte box and a French flag that screws on to the front filter holder of your lens. The kit can be used with DSLRs. This matte box has one 4x4 filter holder. The kit includes a Genus 82mm Snap on ring and step-down rings to mount onto 77mm, 72mm, & 67mm diameter lenses. 82mm, 77mm, 72mm, & 67mm diameter lenses are all supported with this system.