Recently bought a 77mm B+W Circular Polariser. I'm not sure how to use it buy I know the theory behind the polarising light and the angle of polarisation.
My question is, how does the polariser affects image quality? I heard it can give you warmer saturated colours but at which angle should it be?
Also, is it advisable to use a polariser when it is cloudy or in indoors? It makes the image pretty dark...