Digital HT Circular Polarizer Screw-In Filter 37MM This filter is constructed from

This filter is constructed from Water White glass and is made using ColorCore technology

The Tiffen 4 x 5

This infrared design also works proportionately to the density value

Providing a 1+ stop exposure reduction

Slows Shutter Speed for Smoother Motion

Digital HT Circular Polarizer Screw-In Filter 37MM This filter is constructed fromDIGITAL HT Circular Polarizer Anti Reflective and Transmission Coating Surpasses Military Specifications Extra Hard and Durable Deepens Blue Sky Enhances Clouds Minimizes Reflections Low Profile Titanium Lock Ring High Quality ColorCore Glass Made in the USA 10 Year Warranty Can be rotated to achieve desired effect