The B+W 40.5mm Linear Polarizer Filter polarizes the reflected light rays. With this polarizing glass filter, you can choose the light rays that enter the camera lens.It saturates colors and removes unwanted reflections for providing better contrastThis glass filter removes haze and increases color saturation without affecting the overall color balance The B+W 40.5mm Linear Polarizer Filter has high light transmission characteristics and produces good shadow detailThe camera’s viewfinder allows you to view the effects obtained by rotating the filterDepending upon the rotation of the filter and its orientation towards the sun, the filter factor of this camera UV filter varies