The Tiffen Ultra Contrast 1 4 x 5.65" filter helps open up your shadows by utilising the ambient light surrounding the image area as well as the light present in the image itself. It reduces contrast uniformly throughout, with little or no loss of sharpness in the scene, even when different degrees of brightness exist. Shadow areas will reveal more detail but without any flare or halation from direct light sources or bright highlights. 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 open up the shadows. The Ultra Contrast #1 filter is the first full grade available for this filter. More ambient light is used to open up your shadows, but you will still see no flare or halation in the highlights. Sharpness remains constant. Tiffen's ColorCore glass is produced through a process that permanently laminates the filter material between two plates of optical glass, polished flat 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 the highlights, the shadows appear without detail; if you expose for the shadows, the result is washed out and the highlights are excessively bright - Contrast reduction is achieved by lightening the shadows without overexposing or darkening, or by darkening the highlights without further darkening the shadows - Even when filming directly towards the sun, no flare or halation is produced - Tiffen's ColorCore glass is sealed between two plates 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 deviations during the colouring process Specifications