Tiffen's Warm Soft/FX combines soft focus technology with their exclusive 812 warming filter which balances contrast on skintones. The FX series of soft focus filters have a pattern of tiny lenslets which put smaller details, like wrinkles and skin blemishes, out of focus while leaving larger details, such as the eyes, sharp and clear. Warm Soft/FX filters are available in most sizes and in grades of 1 to 3, with grade 3 having the most softening effect. Warm Soft/FX's produce practically no highlight flare or contrast reduction and gives skin a warm healthy glow in portrait photography.