The Tiffen 4"x4" Clear (Optical Flat) Filter is also known in the motion picture industry as optical flats. Used to protect the lens when shooting outdoors or on stage where blowing dirt, sand, smoke, or salt air my come in contact with the lens.
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov
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