Polarizer is a kind of can eliminate or partially eliminating additional lens polarized light.

Usually according to the working principle of polarizer is divided into line polarizer (PL) and circular polarizer (CPL), the most simple identification method is the polarizer near the eyes, reflective observation non-metallic scene, turn the polarizer to a certain Angle, reflective will weaken or even disappear;The polarizer, in turn, make the same experiment, PL see the same result, but little change scene is observed by CPL.For daily use, the use of the polarizer opportunity or a lot, especially when shooting landscapes, feels more obvious, and it also can be used as UV, so more get the favour of people.

Polarizer, wider use of in photography more used for the following:

A, can eliminate or weaken the smooth surface reflective;

Two, can make the color the sky darkened;

Three, can be piled up two pieces instead of grey filter;

Four, can improve the color saturation of the image.

Dress in the window and the window glass reflective added together, it is difficult to see the color of the clothes and style (see photo A), add (PL), after using A linear polarizer reflective part get reduced (see photo B).