VOCAS 143mm to 114mm Step down ring for MB-435/436/455

Vocas 143 mm to 114 mm Step down ring for MB-435 / MB-436 and MB-455 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-435, 436 and MB-455 matte box (with 143 mm front diameter) as a clip-on on a lens with a front lens diameter of 114 mm. This ring also allows the use of all 114 mm step down adapter rings with the MB-435, MB-436 and MB-455 matte boxes.