| Ask Peter Q. Can you recommend a book on the science of light? A. Focal Press recently released the third edition of Light -- Science and Magic by Fil Hunter, Steven Biver, and Paul Fuqua. Among numerous other subjects, it fully explains the benefits -- and pitfalls -- of double polarization.|
The unretouched pictures here show a portrait done with and without double polarization. The model is wearing a moisturizer that produces the sheen visible in the straight shot. Polarizing both the light source and the lens fully eliminates that sheen and smooths out the skintones more completely than is possible with the lens polarizer alone. A Rosco Cinegel 17x20-inch Polarizing filter ($40, street) covered the softbox, and Hoya's 67mm Moose Peterson Warming Polarizer ($80, street) was on the lens. Moose's filter arrests the polarized light and contributes the flattering warmth. It's a great filter for people pictures.