Abstract
Data are given on the amount and distribution of light which can be obtained on the transparent screen with regular high-intensity carbons and various optical systems. These optical systems include two condenser-type systems and two relay-condenser-type systems used with f/2.3 and f/2.0 objective lenses. Values are obtained which are in line with the recommendations on Process Projection Equipment by the Research Council of the Academy of Motion Picture Arts and Sciences. — In addition, characteristics of two new carbons developed for this purpose are given. These are also evaluated in the relay-condenser system and give the advantage of additional light, or the same light at lower energy input.
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