The Nude/FX filters are skin tone enhancing filters. They offer ultimate flexibility and control in shooting skin tones. They are designed to make your subject look their best. These filters allow you to custom complement the complexion or make-up or create a new look. Although results may be very subtle with still photography, the effects of the Nude/FX are seen more substantially with digital and video applications. The Nude/FX filters are perfect for headshots, close-ups and whenever a lot of skin is showing in the image with minimal effect on the rest of the scene. Combining the Nude/FX filter with one of Tiffen's Diffusion or Glimmerglass filters (sold separately) provides the best of both worlds - beautiful, warm customized skin tones, and silky smooth skin without the unwanted wrinkles and blemishes. This is the ideal approach to portrait photography. This filter is designed to fit lenses with a 77mm filter size.