OConnor Universal Ring - 114 mm (Threaded)
The OConnor Universal Ring 114-55 Threaded is an aircraft grade aluminum donut ring for OConnor's O-Box mattebox. It features a high-tech composite flex material that seamlessly supports any lens from 104mm to 55mm in diameter. A threaded bellows ring is required for attaching to the O-Box mattebox. The bellows ring clamps onto the O-Box, and this donut ring screws onto the bellows ring.
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