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The 85mm GEM-COAR85 Clamp-On Adapter Lens Adapter Ring for Select Matte Box from Genustech is a split-ring-design, Delrin adapter ring that enables you to mount the GML Lite, GWMC Wide Angle, and GPVCMC Panavision Wide Clip-On Matte Boxes onto a lens with an 85mm front. It clamps onto the outside of the lens and avoids needing to be screwed into the lens filter threads.
It is advisable to use clip-on matte boxes with lenses that do not have rotating fronts, as rotating fronts may lead to exposure changes when using a polarizer, or vignetting of your image as you matte box rotates.
Made from black Delrin to minimize reflections
The split ring design makes it easier to mount the adapter on your lens
In the Box
Genustech GEM-COAR85 Clamp-On Lens Adapter Ring for Select Matte Box (85mm)