The MMB-1 can be rendered compatible with the MMB-2 range of Stills lens Clamp-on rings, Cine lens Clamp-on rings and Flexible Light Protection system. This adapter ring is a one step reduction from the MMB-1 native 143 mm diameter and can be used directly on lenses with a 114 mm front diameter, such as the ALURA lightweight zooms range and Master Primes lenses.