Heliopan filters are available in every imaginable size and configuration, including 13 different types of polarizers and special-effects filters. They're made from glass supplied by Schott, which is wholly owned by Carl Zeiss and set in black anodized brass rings that screw in with precision. Heliopan thin circular polarizers accommodate ultrawide-angle lenses. The High-Transmission Circular Polarizing Multi-Coated Filter features SH-PMC multilayer coating, which transmits 98.8% of light and absorbs only one ƒ-stop, thereby enabling exposure flexibility.
Hoya is one of the world's largest manufacturers of optical glass, including glass used for camera lenses, eyeglasses and photographic filters. Their production process involves the introduction of raw elements and chemicals to molten optical glass to produce a filter of uniform coloration. The Pro 1D filters are designed exclusively for digital cameras and offer advanced features like enhanced multicoating, black-rimmed glass and low-profile frames that don't cause vignetting on wide-angle lenses. They're available in sizes up to 82mm.
Kenko Zeta Wideband Circular Polarizers are handsome and precise, and are supplied in the most unique protective cases imaginable. They're constructed using premium quality polarizing film and are treated with ZR (Zero Reflection) Super Multi-Coating. They sport an ultrasmooth surface that's stain- and scratch-resistant thanks to Kenko's proprietary Nano Glass Technology. The ultrathin threaded ring is compatible with wide-angle lenses. Kenko Zeta polarizers can be found in sizes from 49mm through 82mm.
Pro-Optic circular polarizers are well made and very affordable. Although their price tag says "budget," their quality and performance puts them right up there with the higher-priced brands. A 52mm C-PL, for example, will set you back less than $20. Made in Japan of the highest-quality materials and optical glass, Pro-Optic polarizers are a good choice especially when you need to cover many different sizes. Adorama offers an attractively priced assortment of filter accessories for Pro-Optic (and other) polarizers, including screw-in metal lens caps, metal lens shades and stack caps.
Singh-Ray calls their polarizers "Lighter, brighter" because they transmit more light than average and require less exposure compensation. The LB ColorCombo Warm Circular Polarizer/LB Color Intensifying Filter provides full polarizer benefits, plus color enhancement for outdoor scenes, particularly reds, browns and greens. The thinner-mount version of this filter can be used on lenses as wide as 12-24mm without corner vignetting. They also can be used in conjunction with the Galen Rowell Graduated Neutral Density Filters.
The Tiffen Company has earned Oscars®, Emmys® and numerous other awards. The Digital High Transmission (DHT) Circular Polarizing Multi-Coated Filter is constructed of high-quality optical glass and available in all popular sizes. Tiffen's patented ColorCore technology assures that the filter is given the highest scratch-resistant durability available.