All images by Cory Silken. Used with permission.
I have a love/hate relationship with polarizing filters. Their effect can be useful, however, they traditionally reduced exposure by a couple of stops. In addition to the obvious implications on exposure, this also hampers autofocus performance. I was thrilled to learn that new filters are made with a more transmissive polarizing film, and the Breakthrough Photography X4 Circular Polarizer lets through about a half a stop more light!
I often photograph yachts and sailboat racing, and using a polarizing filter sometimes helps show off the beauty of the marine environment. Getting a sharp picture of a moving subject while on a moving platform requires the highest shutter speed I can get, so the half stop improvement is tremendously useful for my work.