The Tiffen 4 x 4" Warm Black Diffusion/FX 1/2 filter diffuses strong light entering the lens and produces a halo 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. In addition to the diffusion provided, a warming effect is also built into the filter, helping to further balance skin tones. The 1/2 density offers more softening than the 1/4, but less than the 1.nnTiffen filters are manufactured using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass and grinding it flat to a tolerance of 1/10,000th of an inch. This filter measures 4 x 4" / 101.6 x 101.6 mm.nnnFeatures:nn- The diffusion filter imparts an ethereal quality to photographs, resulting in a dreamlike atmosphere.n- The soft image quality does not compromise the overall detail of the image.n- Light entering the lens is diffused by small aberrations, creating a soft halo rather than the sharp, well-defined image obtained without a filter.n- The additional warmth provided adds more halo effect and helps to further balance skin tones.nnnSpecifications:nn- Type: Warm Diffusionn- Size: 4 x 4" / 101.6 x 101.6 mmn- Grade: 1/2 Densityn- Effect: Diffuses light entering the lens, creating a halo effect. Additional warmth is given to imagesn- Construction: ColorCore Technology