The Tiffen 4 x 6" Nude/FX 3 Filter is a skin tone enhancing filter that provides gentle warmth to the image and helps to smooth out blemishes. This filter works by infusing the background areas of the scene with the filter tone and blending the skin tones with additional warmth. The 3 density provides more skin tone enhancement than the 2, but less than the 4.
Tiffen filters are made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding flat to a tolerance of 1/10,000th of an inch. This filter measures 4 x 6" / 101.6 x 152.4mm.