Special Features:

Light source, dual-color electroluminescent; blue 455 nm porm 10nm; green 520 nm porm 10nm; repeatability, porm 0.04 d log exposure from unit to unit; stability, porm 0.02 d log exposureper year at 10 degrees to 45 degrees c; exposure area, 21 steps, each 5mm x 10mm; power, two 9v alkaline translator batteries; optional ac power converter; wt, 2.5 lbs; two second delay to prevent double exposures

Properties:

A mechanical device which measures the sensitiveness and other characteristics of a photographic film or plate by producing upon a sensitized surface a known exposure, or a series of known exposures. The correct printing exposure for each scene is measured or determined and/or the scenes may be matched to a uniform density.