Buy 40.5MM Circular Polarizer for just $ 22.99 Features Circular polarizing filters cut glare and reflection making them the perfect choice for outdoor photography. This filter is designed to fit auto focus cameras and rotates for the best effect. By cutting glare and reflection, this filter gives deeper color and better definition. Depending on the angle of the sun, this filter will make clouds stand out against a deep blue sky and deeper greens in foliage. Tiffin's used of high quality glass and polarizing materials make this the ultimate choice for your camera.