Digital HT Polarizing FiltersPolarizers provide color and contrast enhancement. Reflected light often shows up as whitish glare that washes out color in an image. A Polarizer corrects this problem producing deep, dramatically blue skies. It also removes glare from non-metallic surfaces, such as windows and water. Color saturation in general, especially outdoors, can be improved significantly.Polarizer/Circular PolarizerEssential general-use outdoor color filterProduces deeper skies and minimizes reflections in black and white and color photographyCombine a Polarizer with a Red 25 for incredibly dramatic black and white landscapesCan be rotated to achieve desired effectUse the Tiffen Polarizer with the enhancing filter for more dramatic effectsAvailable for Wide Angle lensesFilter Properties At A GlanceFront ThreadsYesAccepts Snap In Lens CapYesFilter Ring Depth (Less Threads)6mmCoatingMulti-CoatedFilter Factor2- StopsA Circular Polarizer has the same effect as a Polarizer and is used on cameras with beam splitting metering systems commonly found on auto focus SLR's (for most 35mm auto-focus cameras see your camera manual). Area of sky most effectively polarized with a Circular Polarizer:Point your index finger at the sun. With your thumb extended at a right angle (90), rotate it around the axis of the index finger. It will point out the band of deepest blue from horizon to horizon.Digital HT FiltersDigital HT filters area state-of-the-art technological breakthrough in multi-coated photo and video filters. Made for the discerning professional and imaging enthusiast, Digital HT filters with Hi-Trans Double-Sided Titanium Multi-Coating surpass even military specifications for hardness and durability.*Digital HT - High Transmission -filters offer the strength of a Titanium coating combined with the purest optical quality glass and Tiffens Academy-Award-winning ColorCore technology. They present unmatched scratch-resistant durability and worry-free cleaning while other coated filters on the market today cautiously suggest delicate, if any, cleaning procedures, in fear of destroying the coating (and thereby the filter).And thats not all ? these High Transmission filters feature a low profile titanium finish ring and anti-reflective black lock ring which sets these filters apart from the rest.Digital HT filters are made in the USA and come with a 10-year warranty ? your guarantee of quality assurance.More...Digital HT filters are available as: Digital Ultra Clear, Haze 86 (with 86% UV absorption), Circular Polarizer, 812 Warming Filter, ND 0.6, ND 1.2, Soft/FX 3, Star 4 Point 2, and Color-Grad ND 0.6 in sizes 52mm-82mm.Each filter comes with its own distinctive soft pouch for storage when not in use.Tiffens research and development team has conquered the challenges of multi-coating. No longer is your investment in a multi-coated filter subject to the everyday challenges of dirt, humidity, and potential scratching which can render your multi-coated filter useless.Along with the extreme toughness and durability, Tiffen Digital HT Titanium Coating features excellent Anti-Reflective and Transmission (HT ? High Transmission) characteristics. The Titanium coating consistently reflects less than 1% of the imaging light hitting the front surface of the filter while transmitting nearly 99%. * Independent testing based on these specifications was conducted at the Rochester Institute of Technology (RIT), Rochester, NY. 1. Abrasion test ? Severe abrasion test according to MIL-C-48497, using eraser stub certified to MIL-E-12387.2. Adhesion test ? tape adhesion test according to MIL-C-48497, using adhesive tape certified to MIL-A-A113 rev C.3. Humidity Test ? humidity test in accordance with MIL-C-48497, 95% RH at 50 degrees C for 24 hours.Why You Need Tiffen Optical Filters There is something to be said for creating images at the moment of exposurethe way most of the worlds greatest pictures have been made. Tiffen optical filters let you do just that, by being able to preview the effect youll get when it matters mostwhen youre behind the camera.There is nothing wrong with using electronic plug-in filter programs that let you add effects or manipulate the image after its taken. But if you really want to own the final images you compose, theres no substitute for Tiffen optical filters. Theyre simply unsurpassed when it comes to controlling color balance and special effects with precision, repeatability, and convenience.Its important to remember that filtering the light, before it passes through the lens and strikes the image sensor or film, has important advantages. It lets you match the brightness range of the scene to the characteristics of the capture medium, and get professional quality results even under tough lighting conditions. Tiffen Polarizing filters actually polarize the light, to eliminate reflections on glass and water surfaces while retaining sub-surface details. Neither of these effects are possible with after-the-fact plug-in filter systems, which can only provide filter effects, not true light filtration.Why Tiffen Filters Are Superior Tiffen filters are manufactured using ColorCore technology, a closely guarded proprietary process that entails permanently laminating the filter material in between two pieces of optical glass that are ground flat to tolerances of a ten-thousandth of an inch, then mounting them in precision metal rings. The ColorCore process allows us to control the color and density of Tiffen filters, and the characteristics of special effects filters with much greater accuracy than typical dyed-in-the-mass filters, which usually exhibit color and density variations.When Tiffen filters are ground and polished, the ColorCore is unaffected, so color and density remain uniform. Indeed, when you hold a group of Tiffen filters of the same type against a white sheet of paper, they all look identicalbecause they are! Try this with our competitors filters and youre likely to see slight variations.Maybe thats why most top Hollywood motion picture studios rely on Tiffen filters for their multimillion-dollar productions, or why we can custom-make an exact replacement for them if one breaks on the job. Thats consistency, and excellencetwo pretty good reasons why, when it comes to filters, you should rely on Tiffen too.See the Difference Tiffen Filters MakeTiffen filters make a big difference indoors, outdoors, in close-up portraits or milewide landscapes, in bright sun or shade, and in many other photo situations?the right Tiffen filter delivers a great image instead of a snapshot. Whether youre shooting photos or video, in black and white or color, Tiffen filters offer a variety of subtle, special and spectacular effects to give you more enjoyment every time you use your camera or camcorder.