Hoya HD Filter

According to the magic coating which really do repel dirt, dust and fingerprints.

These HD filter from Hoya use specially hardened glass that is far more resistant to breakage than other optical glass.

Ken Rockwell added

"More importantly, the new HD polarizing filters use magic polarizing material that loses less light. Most polarizer lose two stops of light. I measured this one, and it lose only 1 and 1/6 stop of light. This means sharper photos at lower ISOs than using regular polarizers, about one full stop better"

Hoya HD Filter Factor

HD CIR - PL: 1-1/6 Stops (2.2x)

UV: No light loss (0x)