What Does a Circular Polarizer Do?

Video: shutterstock

If you watch more than a few filmmaking videos, you’ll hear how it’s almost essential to own a neutral density filter to shoot at a shallow depth of field while in bright circumstances. One filter that isn’t talked about much is the polarization filter. Yet, it may be even more useful than the others.

So, what do they do? Quick video tip above and more info on the link below.
Source: Shutterstock Blog