The high class filters of the Pro Edition series meet even the highest demands of professional photographers. Thanks to the glass types used and the precision processing, they ensure crystal clear image reproduction over the entire focal length range. They do not affect the optical system in any way, which is extremely important for image sharpness. This ensures maximum optical performance for digital and analogue photography. The narrow frames prevent vignetting in the picture ceilings. Nevertheless, they offer a front thread for lens hood or lens cap. All Pro Edition filters come in a handy and robust transport box. Filter effect: front lens protection, improved remote recordings, reduces chromatic aberration, colour-neutral highlights: S-HD Schott high definition precision glass for highest resolution, MC18 18-fold multi-coated, scratch-resistant, W water-repellent nano coating, digitally optimised for digital, U-Slim filter socket in ultra-slim design with front thread, non-slip screw-in thanks to ribbed edge