Collaboration between respected wildlife photographer and conservationist B. Moose Peterson of Wildlife Research Photography and Kenko Tokina USA, Inc., created a circular polarizing filter that uses 81A optical glass made by Hoya, the worlds largest optical glass manufacturer, instead of the clear optical glass of a normal circular polarizer.

The Warming Circular Polarizer is a circular polarizing filter that uses 81A warming optical glass made by Hoya, instead of the clear optical glass of a normal circular polarizer.

This filter is the result of a collaboration between respected wildlife photographer and conservationist B. Moose Peterson and Kenko Tokina USA, Inc.

• Filter Factor: 1.2 to 1.5 stops
• Hardened Top Layer: No
• Anti-Static: No
• Frame Construction: Standard Profile / Aluminum
• Front Filter Threads: Yes

• Hoya 49mm Warming Circular Polarizer Moose Filter