Vocas 105mm to 95mm Step Down Ring for MB-3XX, Fujinon Wide Angle LensesVocas 105mm to 95mm Step Down Ring for MB 3XX, Fujinon Wide Angle Lenses When using a matte box as clip on, step down rings can be necessary, with or without thread. This ring is required when using a MB 3XX matte box as a clip on on a lens with a front lens diameter of 95 mm (for Fujinon wide angle lenses). Technical Specifications Manufacturer Vocas Systems Diameter 95 mm Mounting options Clamp Clip on Yes Material Industrial plastic Color Black