Originally posted by bdery
That's a load of bull...
In most photographic situations, light is non-polarized, which means that every polarizer on the planet, by means of the physical properties of light, will cut half the light passing through. There is no magic involved.
Coatings are there to improve the transmission of the ~4% of light reflected on any surface. No coating is perfect, and 4% is not "a full stop". And Hoya are far from having the only effective coating process out there.
Hmm, but he claims it's not the coating but the new polarizing material itself that makes the difference. Don't know how Ken measures it, but one stop difference would be easily verifiable if it is true.