The filters features a lightweight, two-piece, very low-profile aluminum frame to house the glass.

• This filter is non-coated and has approximately 93% average light transmission. It is constructed from optical glass and precision-milled aluminum-alloy frames.
• Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.
• Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light.
• Clears up haze in distant landscapes and provides more saturated, vivid colors.
• Strongest effect when used at a 90° 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.
• Approximately 93% average light transmission.
• 3 to 4x filter factor reduces exposure by 1.6 to 2 stops.
• Constructed from optical glass and precision milled aluminum frames.
• Plastic filter case for storage and transport.