The Tiffen Fog 1/2 4 x 4" filter simulates the effects of natural fog or haze by creating a soft glow around highlights and reducing the overall contrast of the scene. There may also be a softening effect due to how light interacts with the subject. The 1/2 density offers a greater fog effect than the 1/4, but less than the 1, and requires no exposure compensation. 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- Provides a fog effect with brilliant highlights and reduced overall contrast.n- Requires no exposure compensation to account for the filter's effect.nnnSpecifications:nn- Type: Diffusion/Fog Effectn- Size: 4 x 4" / 101.6 x 101.6 mmn- Grade: 1/2 Densityn- Effect: Reduces contrast and gives a brilliant quality to highlightsn- Construction: ColorCore Technology