Dark CPL

Introducing the world’s most advanced circular polarizer. The moment you use the X4 CPL, you know you’ve never used anything like it. Featuring our all-new American made CPL film and an all-new brass traction frame features best-in-class design and durability. And that’s just the beginning. No Filter vs. X4 CPL   Technology World’s most color neutral CPL. Guaranteed. Our all-new and internally developed CPL film is at the core of the X4 CPL, and we manufacture it right here in California. To achieve the worlds most color neutral performance, we had to develop a unique approach to manufacturing rather than selecting off-the-shelf CPL film common among filter manufacturers, which is designed and intended for LCD panels, not photographic optics. All commercially available CPL filters exhibit a yellow cast due to a gradual transmission increase starting around 600nm and then spiking at 650nm onward into IR. With our X4 CPL film we achieved a gradual transmission decrease from 600nm on