Mount an 85mm matte box onto your lens with this 82 to 114mm Front Pro SimRing from Simmod. The black, anodized aluminum ring screws onto any lens with an internal 82mm filter thread. It provides a 114mm outer diameter to fit your clamp-on matte box, and it is designed to reduce vignetting on wider lenses. There is no front filter thread on this SimRing.
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