- Inside diameter: 4.49" (114 mm)
- Outside diameter: 5.43" (138 mm)
This 138mm to 114mm Adapter Ring for MB-430 from Vocas has an inside diameter of 114mm and an outside diameter of 138mm.
The ring fits into the rear clamp of the MB-430 matte box, allowing users to mount the matte box onto lenses with an outside diameter of 114mm.
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