The Tiffen 4 x 4" UV Haze 2A Filter is a clear, general-use filter that helps to absorb ultraviolet light and reduce the bluish cast of daylight. This filter is particularly useful for high-altitude photography or around bodies of water. It does not provide any additional colouration or contrast, allowing you to pair it with other filters. This filter eliminates virtually all UV radiation.nnThe UV filter is also useful as a general protective filter to leave on lenses permanently. Filters help to reduce dust and moisture that could reach your lens element and provide additional protection in the event of drops or situations where scratches could occur.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- Absorbs all UV light and reduces the bluish cast of daylight.n- The clear filter provides no additional colouration or contrast, allowing you to pair it with other filters.n- General protective filter reduces dust, moisture and scratches that could reach lens elements.nnnSpecifications:nn- Type: UV/Hazen- Size: 4 x 4" / 101.6 x 101.6 mmn- Grade: UV/Haze 2An- Filter Factor: 0n- Effect: Absorbs UV rays and reduces the bluish cast of daylightn- Construction: ColorCore Technology