Cir Polarizing Filter

Cir Polarizing Filter
Using Quality Hoya CIR-Polarizing Filter High DSLR?

So I just bought this and I'm not 100% sure how to use. Any advice? The filter was not $ 100. Is 34.50.

You have to look through it to compose your shots as they include a lot of sky. When you point the camera toward the northern skies (90 degrees to the soles of arc) By rotating the filter, you can see the sky darkens. The other use is when you are pulling objects that reflect light such as ponds and other objects of reflection that surprised me was to spend about $ 100 on an item you do not understand. Does anyone suggest you buy the filter?

Canon XL2 – HOYA PRO1 Circular Polarizer TEST