4x5.65 +1/2 Diopter Brilliant² Tray Mount Studio Close-Up Lens - The 4"x5.65" +1/2 Diopter Brilliant² Tray Mount Close-Up Lens fits directly into 4"x5.65" matte boxes, occupying 1 slot in the matte box. The new Studio version Tray Mount Close-Up lenses have a knurled stainless steel post mounted on the handle to improve handling in studio matte boxes. They also fit other rod mounted and lightweight clip-on matte boxes. A close-up lens with a strength of +1/2 diopter is used to focus on a slightly smaller object field, when the cine lens being used won't focus that closely. To create the Brilliant² Tray Mount Close-Up Lens series we've mounted our 138mm Close-Up Lenses (Diopters) in a 4"x5.65" matte box tray. These large 138mm round lenses provide a 5.1" diameter clear aperture in the tray, allowing use with large lenses and wide angle lenses. All of our lenses have a broadband multi-layer anti-reflection coating (MC Coating). The unique tray mount design allows quick and easy changes of close-up lenses in both clip-on and rod mount matte boxes. They are available in 5 strengths: +1/4, +1/2, +1, +2 and +3 Diopter The +1/4, +1/2 and +1 fit in one slot. The +2 uses 2 slots and the +3 uses 3 slots in the matte box. The Brilliant² Tray Mount Close-Up Lenses (diopters) fit in Arri, Bright Tangerine, Chrosziel, Vocas and other professional 4x5.65 cine matte boxes. They do not work with RedRock Micro matte boxes.