Description Built into a single-stage self-contained unit, the 4 x 5.65″ Circular Polarizer and Tray is a compact, easily rotatable polarizing solution for most matte boxes that accept 4 x 5.65″ filters; convenient for most renters. Rather than requiring a full 4 x 5.65″ glass filter, the tray uses an included 138mm diameter 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.
