Tiffen 45650WPOL (45650-WPOL) 4x5.65 Warm Polarizer (WPOL) Filter. Polarizing Filters
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.

Polarizer/Circular Polarizer

Essential general-use outdoor color filter

Produces deeper skies and minimizes reflections in black and white and color photography
Combine a Polarizer with a Red 25 for incredibly dramatic black and white landscapes
Can be rotated to achieve desired effect
Use the Tiffen Polarizer with the enhancing filter for more dramatic effects