The Tiffen Ultra Contrast 2 6.6 x 6.6" filter helps brighten your shadows by using the ambient light around the image area as well as light from the image itself. It reduces contrast uniformly throughout, without loss of sharpness in the scene, even in the presence of different brightness levels. Shadow areas will reveal more detail but without flare or halation from direct light sources or bright reflections. The Ultra Contrast works similarly to a Tiffen Low Contrast filter, the difference being that it reduces contrast across the entire image whereas a Low Contrast filter will only brighten shadows. The Ultra Contrast No.2 filter continues to capture even more detail in shadow areas. Contrast continues to be lowered uniformly across the entire image area. Sharpness is still not compromised and you will not see any flare or halation appear. Tiffen's ColorCore glass is produced by a process that involves permanently laminating the filter material between two pieces of optical glass, polished to a tolerance of one ten-thousandth of an inch, then mounted in precision aluminium rings. - Bright lights or sunlight create problems when the ratio between highlight and shadow areas exceeds the film's latitude; if you expose for highlights, shadows appear without detail; if you expose for shadows, the result gives washed-out, overly bright highlights - Contrast reduction is achieved by brightening shadows without overexposing or darkening, or by darkening highlights without further darkening shadows - Even when photographing directly facing the sun, there is no flare or halation - Tiffen's ColorCore glass is sealed between two sheets of optical glass. In this way, Tiffen can better control the different densities of their filters and thus create more precise degrees of filtration. This process allows for greater colour accuracy compared to simply tinted glass which may be subject to variations during the colouring process Specifications