This Revar Cine 4 x 5.65 / 138mm Variable ND Kit B from Alan Gordon Enterprises darkens the entire image area from 2- to 8-stops by rotating a 138mm circular polarizer in combination with a 4 x 5.65″ linear polarizer.
This kit is suited to working with smaller matte boxes like the Bright Tangerine Misfit Atom Pola + or for those using matte boxes where the 4 x 5.65″ stages are already used up with filtration/ tray mounted diopters, making use of the spare 138mm tray in the rear. It can also be used with the new Bright Tangerine 2-stage ONE Tray as well as popular ARRI LMB and MB with 4 x 5.65″ and 138mm trays. Placing the 138mm Circular Polarizer Pola+ in the rear donut or 138mm rotating filter holder of the matte box, and the rectangular 4 x 5.65″ filter in front, simply rotate the 138mm filter for the variable neutral density effect. Optimized for lighter matte boxes, this kit is a solution for Steadicam and gimbal work.