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apex

  1. Doug Kerr

    The APEX system (Additive System for Photographic Exposure) - updated technical article

    The APEX system (the Additive System of Photographic Exposure), introduced in 1961 (good grief! I was only 25 years old then!) defines a system of specifying various factors involved in photographic exposure (exposure time, film sensitivity, etc.) in logarithmic form. Its main objective was to...
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