Pro View Filters are made in Japan from high grade Mullticoated glass in a Slimline frame specifically for use with Digital SLR Cameras incorporating wide-angle lenses. Digital camera's CCD and CMOS convert the lights into electric signals. This is the reason why lens' inner reflection, flare, ghost and some other phenomenon rise and result in interior quality of picture, consequently.The DHG series can minimize these phenomenon and maximize the performance of your lens. Special Coating New developed ultra-low reflection coating for digital cameras does minimize flare and ghost. Black-ink process on lens outer rim Lens outer rim is painted in black to minimize inner reflection. Special frame Satin - like smooth frame having quality appearance does minimize extra reflection.