Reader's Comments - Index of - Free

Filters - UV or not UV?
In addition to the UV filters I also looked at a three filters often used in place of a UV filter (i.e. filters which some
photographers keep on the lens at all times as protection). These are the Hoya 81B, the Tiffen 812 and the B+W
KR1.5. All three are warming filters in that they shift the color balance towards the red (warm) end of the tonal
range. I also included a Hoya circular polarizer, just because I had one around.
As you can see all three of the warming filters were effective UV absorbers, as well as slight absorbers in the blue
and green regions of the spectrum (which is what makes them warming filters). The polarizer absorbed slightly
more in the UV than the visible, though I wouldn't call it an effective UV absorber.
http://www.photo.net/equipment/filters/ (3 of 12)7/3/2005 2:21:53 AM