Recently I had the opportunity to use a new product from Breakthrough Photography. They have a new ring which can use not only their square and rectangular holders but also a magnetic circular polarizer. Check out the video!
I recently had the opportunity to use Breakthrough Photography's X4 10 Stop ND Filter (round 77mm filter). The company boasts their ND filter is the most color neutral and sharpest on the market. That is a pretty tall position to take when you consider some of the other filter companies such as Lee or Singh-Ray.