The purpose to applying an antireflection coating has nothing at all to do with the effects of a polarizing grid on light passing through it. Antireflection coatings reduce scatter at the air-glass interface, which causes flare. This is just as much a problem with a polarizing filter's surfaces as it is with any other optical surface.
Godfrey On May 9, 2007, at 9:22 AM, Joseph Tainter wrote: > Since one ideally uses a polarizer at a right angle to the sun, I have > never been certain that adding coating to a polarizer accomplishes > very > much. I believe that Pentax does not add SMC coating to their > polarizers, while they add SMC coating to nearly everything else that > light goes through. > > Tiffens and Hoyas will usually give you good quality at a decent > price. > > For coated filters I prefer Pentax, B+W, or Heliopan. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
