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The Bright Tangerine 114 - 95mm Threaded Donut Ring is a must-have accessory for filmmakers who want to use clamp-on matte boxes with their lenses. This handy adapter lets you mount your matte box closer to your lens, eliminating vignetting and improving image quality. It also works with the optional Bright Tangerine Black Hole adapter, which provides extra light control and flexibility.