The Tiffen Soft/FX 4 4 x 4" Filter diffuses harsh light entering the lens and produces a glowing effect. While the resulting image appears softer and more ethereal, there is little loss of clarity or detail. This filter works by diffusing the light entering the lens with small aberrations; by distributing the light more evenly, a soft halo is created rather than the sharp, well-defined image obtained without a filter. Density 4 provides more softening than 3, but less than 5. Tiffen filters are made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and polishing it flat to a tolerance of 1/10,000th of an inch. This filter measures 4 x 4" / 101.6 x 101.6 mm. Features: - The diffusion filter gives an ethereal quality to photographs, creating a dreamlike atmosphere. - The soft quality of the image does not compromise the overall detail of the image. - Light entering the lens is diffused by small aberrations, creating a soft halo rather than the sharp, well-defined image obtained without a filter. Specifications: - Type: Diffusion/softening - Size: 4 x 4" / 101.6 x 101.6 mm - Grade: Density 4 - Effect: Diffuses light entering the lens, creating a glowing effect - Construction: ColorCore technology