The Tiffen Smoque 2 4 x 4" Filter is a unique diffusion filter that imparts a hazy, smoky quality to your images, mimicking the effects of a smoke or fog machine. This filter is ideal for situations where smoke would normally be present, but is not available or existing. Density 2 produces more smoke effect than density 1, but less than density 3. nnTiffen filters are manufactured 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.nnnFeatures:nn- Produces a hazy, smoky effect across the entire image.n- Mimics the operation of a smoke or fog machine.n- Ideal for situations where smoke might be present, but is not.nnnSpecifications:nn- Type: Smoke effect/diffusionn- Size: 4 x 4" / 101.6 x 101.6 mm n- Grade: Density 2n- Effect: Produces a hazy smoke-like effectn- Construction: ColorCore Technology