Built into a single-stage self-contained unit, the Revar Cine Rota-Tray 4×5.65″ with Circular Polarizer (RotaPola) is a compact, easily rotatable polarizing solution for most matte boxes that accept 4×5.65″ filters. Rather than requiring a full 4×5.65″ glass filter, the Rota-Tray uses an included 138mm filter which sits inside the rotating tray. If the polarizer needs to be adjusted, simply rotate one of the geared wheels, which extend from the top of the tray on either side.
The filter is a 138mm mid-efficiency circular polarizer manufactured from Schott B270 glass. It features 1.5 stops of light loss and Broadband anti-reflective coating for reducing unwanted flares.