This filter uses our XS-Pro Digital mount which is especially suited for DSLRs with wide angle and zoom lenses. It has a front thread for additional accessories. All XS-Pro Digital mounts are made of brass and are matte black to prevent reflections.</br>Truly Neutral Gray design</br>Manufactured from Water-White Schott Glass</br></br>Product Description</br></br>This filter fulfills the desire of many photographers for pure lens protection without a filter effect. Its only function is to keep dirt, sand, or splashes away from the front lens. The extremely clear special glass with high transmission is MRC-finished.</br><br/>http://www.amazon.com/gp/product/B004OR15LI