Check the listing for details. Tiffen 49mm 81EF Light Balancing Filter 4981EF. Condition: New. Listed at 29.95 USD. Tiffen 49mm 81EF Light Balancing Filter 4981EF The Tiffen 49mm 81EF Light Balancing Filter helps to decrease the color temperature by 650K in order to warm the image slightly in order to match the color quality of illumination. When using an 81EF filter, you will be able to attain 3200K balance when the prevailing light source is 3850K. The warming effect of this filter requires a 0.6-stop increase in exposure for normal results.This filter is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings.Light balancing filter decreases color temperature and provides a warming effect.Subtracts 650K in order to attain 3200K color balance from 3850K illumination.Filter factor of 1.5 requires a 0.6-stop increase in exposure.About us TransFilm is specialized in Sales, Service, Rentals of Camera Support Equipment such as Sachtler, OConnor, Vinten, Cartoni, Miller, Libec, Manfrotto, Arri, Mitchell, Teradek, Anton Bauer, Core, Swit. Wooden Camera, SmallHD, Schneider, Tiffen and more. With more than 30 years experience in camera support systems repair, our business has been providing quality repair service at reasonable rates to Rental Houses, Broadcast Networks, Professionals, Hobbyists and other repair shops since 1987. Unlike others, TransFilm is first and foremost a service facility.Questions?Comments?Concerns?Call: 818 763-2036 TransFilmWe Deal in Both-New & Used GearShipping & Handling Information: All Items Will ship by FedEx (PR, HI, AK, APO, P.O BOX, FPO, HI jUST ADD $25) PLEASE VISIT MY STORE FOR MORE GREAT ITEMS!