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Test charts55 개의 제품이 등록되어 있습니다.

EIA halftone gray scale ST-51 The EIA grayscale pattern is a standard 2\" square projection slide. It contains two parallel gray scales. The upper scale has nine nominally equal transmission steps while the lower contains the same number of nominally equal density steps. The transmission values range from 3% to 60%, corresponding to density values of 1.52 and 0.22 respectively. The slide is chrome or opal on glass and densities are achieved by a fine halftone pattern.
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