The 138mm diopter tray holds a 138mm diopter in a standard Arri style 4 x 5.65 matte box allowing quick attachment for close focus situations and rendering it unnecessary to tape diopters to the lens.  The tray uses two standard width filter tray slots to accommodate up to a +2 diopter. Precision machined from solid 6061 aluminum Excellent for anamorphic lenses and lenses with short minimum focus Useful…