Society of Motion Picture and Television Engineers - A New 35-mm. Portable Projector

Author(s): Herbert Griffin
Publisher: Society of Motion Picture and Television Engineers
Publication Date: 1 October 1931
Volume: 17
Page(s): 623 - 631
ISSN (Paper): 0097-5834
DOI: 10.5594/J05575
Regular:

A new 35-mm. portable projector is described. The optical system consists of either the T-20, 900-watt or T-20, 1000-watt lamp, Bausch and Lomb Cinephor condensers, and the lens mounts are so... View More

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