Breakthrough Photography 82mm X4 Dark Circular Polarizer 3-Stop Filter

Breakthrough Photography X4 Dark Circular Polarizer 3-Stop Filter The X4 CPL is engineered to be the sharpest and most color neutral polarizer on the market. The X4 Dark CPL combines the benefits of Neutral Density (ND) and Circular Polarizer (CPL) filters in one compact, high-quality filter successfully eliminating vignetting down to 16mm. Featuring our internally developed CPL film, state-of-the-art coatings and a precision machined brass traction frame, the X4 delivers unparalleled performance and durability.  World’s most color neutral CPL. Guaranteed. The X4 CPL features ultra-clear SCHOTT B270 optical crown glass made with the highest purity raw materials and our cutting edge MRC16 and nanotec Nano Coatings.  At the core of the X4 is our all-new, internally designed CPL film made in the USA. While most manufacturers use off-the-shelf polarizing films intended for LCD panels, we developed a unique approach specifically for precision optics.  The result is an incredibly sharp, colo