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Our TECHSPEC® stepped density filters are available in two configurations – equal density steps or equal transmission steps. They are ideal for calibrating densitometers and colorimeters and attenuating laser sources. Steps will not allow light to pass between them. Filters mount easily with our variable filter translation mount. Each filter has 11 steps, and each configuration is available in density ranges of 0.04 to 2.0 or 0.04 to 3.0.