1Reduces or eliminates glare and reflections, allowing deep, natural colors to show through with great saturation, such as deepening intensity of blue skies 2Suitable for use with digital cameras and auto focus lenses where a linear polarizer will often disrupt auto exposure and focus features 3Easy attachment and removal. Equipped with black rimmed glass to reduce the chance of light reflecting off the edge 4The end of a circular polarizer filter rotates continuously in either direction, allowing you to dial in just the right amount of effect 513 different thread types for your various needs Description: Polarizers provide color and contrast enhancement. Reflected light often shows up as whitish glare that washes out color in an image. A polarizer corrects this problem producing deep, dramatically blue skies. It also removes glare from non-metallic surfaces, such as windows and water. Color saturation in general, especially outdoors, can be improved significantly. Think of it as sunglasses for your camera. Features: Reduces or eliminates glare and reflections, allowing deep, natural colors to show through with great saturation, such asdeepening intensity of blue skies. Suitable for use with digital cameras and auto focus lenses where a linear polarizer will often disrupt auto exposure and focus features. Easy attachment and removal. Equipped with black rimmed glass to reduce the chance of light reflecting off the edge. The end of a circular polarizer filter rotates continuously in either direction, allowing you to dial in just the right amount of effect. 13 different thread types for your various needs. Specification: Material: Optical Glass with Polarizing Coating Threaded Type: 37mm, 40.5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm (Optional) Package Weight: approx. 29-70g Quantity: 1pc Package Includes: 1 x Polarizing Filter Only