Lee Filters 75x90mm Seven5 Circular Polarizer Filter Lee Filters 75x90mm Seven5 Circular Polarizer Filter - Cordura Protective Pouch - Lee Filters Warranty Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface Clears up haze in distant landscapes and provides more saturated, vivid colors Strongest effect when used at a 90deg. angle from the sun Circular polarizers are ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features