Vocas 105 mm to 100 mm Step down ring for MB-3XX

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 (with 105 mm front diameter) as a clip-on on a lens with a front lens diameter of 100 mm. If a MB-3XX matte box is used as a clip-on on a Fujinon A8,5x, A12x, A20x, A22x, A14x, HA15x or Angenieux 7-81 HR, 11x5.3 cine lens, this ring is required.