how to use a polarizer

Why use a Circular Polarizer

If there is one filter that is a must have for all of my lenses it is a Circular Polarizer.  The effects of most other filters can be quickly recreated in post.  There is still a need for an neutral density filter and to some extent a graduated ND filter. The latter can be reproduced in post but requires the blending of exposures through HDR or more manual methods.