Features:

1. A Polarizing Filter, used for both color and black-and-white photography, is colorful and does not affect color balance, but filters out light with a particular direction of polarization. This reduces oblique reflections from non-metallic surfaces, can darken the sky in color photography (in monochrome photography color filters are more effective), and can saturate the image more by eliminating unwanted reflections.

2. The main function of the Circular Polarizer filter (CPL Filter) is eliminating the scattered light in the air, as well as the reflected light of the metal ,glasses and liquid.It is only allow the parallel light through the lens only,so that the camera can get a better picture such as blue sky,white cloud,clean water and so on. When you rotate the CPL filter in its mount, the effects will show up immediately.

3.Product Highlight:
Makes a Blue Sky Bluer
Enhances Clouds
Eliminates Reflections
High Quality Optical Glass
Black Aluminum Filter Ring

4.Why use a Polarizer?

Polarising filters are used to manage light at wavelength scale, and if magnified could be a likened to a series of microscopic slats.
In use, as the filter is rotated, it either transmits or blocks the waves of light that are vibrating in particular orientations. When light from the sun bounces off a flat non metallic surface, such as glass or water, it becomes polarized - i.e. all of the reflected light waves vibrate in the same plane. This reflected glare can be removed by the polarizing filter.Rotation of the filter will be needed to find the optimal position of the Polariser. In photographic terms this can render water or glass transparent, and gives the impression of saturating colors in a scene, because much of the reflected glare from the subject is removed by the Polariser.

On a clear sunny day, much of the light in the sky is also polarized, and the filter will give a very strong blue effect when used at 90 degrees from the sun - any white clouds will stand out impressively.

5.Lens specifications:
40.5mm: for Nikon J1, V1, Olympus EP-1, Olympus EP-2, etc.
49mm: for Sony NEX series 18-55 and other lenses with a diameter of 49mm.
52mm: for Nikon 18-55, Canon 50/1.8, Nikon 50/1.8D and other lenses with a caliber of 52.
55mm: for Nikon 18-55, 55-200, 55-250 and other lenses with a caliber of 55mm.
58mm: for Canon 18-55, 55-250; Nikon 50/1.4G, 50/1.8G and other lenses with a caliber of 58mm.
62mm: for Pentax 18-135, 18-250 and other lenses with an aperture of 62mm.
67mm: for Canon 18-135, 70-200mm f/4L IS USM, Nikon 18-105 and other lenses with a caliber of 67mm.
72mm: For Canon, Nikon 18-200, Canon 15-85 and other lenses with a caliber of 72.
77mm: For Canon, Nikon 70-200, 24-70, 24-105 and other lenses with a caliber of 77mm.
82mm: for Canon 16-35 and other lenses with a caliber of 82mm."