Tiffen ROTARNDGLASS 138mm Circular Polarizer Filter

The Tiffen 138mm Circular Polarizer (ROTARNDGLASS) is engineered for professional motion picture and broadcast applications where optical precision is non-negotiable. Built from Water White glass — a high-purity formulation that minimizes color shifts — and housed in an aluminum-alloy ring, this filter is designed to slot into the Tiffen Multi Rota Tray system. Once mounted, polarization intensity is controlled via the tray's external dial, giving cinematographers smooth, repeatable adjustments without introducing vibration or fingerprints on the glass surface.

Beyond standard glare and reflection reduction, this filter's circular polarization design incorporates a quarter wave plane that preserves the accuracy of autofocus and metering systems — a practical necessity on modern camera bodies. For shooters who need density control in addition to polarization, pairing this filter with a Tiffen 4 x 5.65" Circular Polarizer in the same tray produces a variable neutral density effect spanning 2 to 6 stops, eliminating the need to swap ND filters between takes. The non-coated glass keeps the optical path simple but does mean shooters should be mindful of strong light sources that could introduce flare.