Features and Functions: Description: The Tiffen 812 Glass filter improves skin tones and is ideal for portraits taken on a cloudy day or outdoors in shade on a sunny day.When your subject needs just that little extra touch of "pink" in their face, the Tiffen 812 can save the day. This filter makes the difference between a portrait that seems "washed out" and flat or one that is so much more flattering to your subject.Tiffen, a leader in the filter industry, proudly makes its filters in the USA and backs up its products with a solid 10-year warranty.Uses:Ideal for portraits or sceneryAbsorbs blue cast often caused by electronic flashAdds warmth to pale washed-out flesh tonesWarmer results than the Skylight 1-A filterColorCore Technology: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 ringsThe ColorCore process allows Tiffen to control the color and density of their 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.Superior Quality:Top Hollywood motion picture studios rely on Tiffen filters for their multimillion-dollar productions Superior quality and design make Tiffen the overwhelming choice of moviemakers, professional photographers and even NASATiffen has also been awarded an Emmy, from the Academy of Television Arts and Sciences, for its engineering excellence