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Old 08-01-2017, 10:57 AM
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old_tv_nut old_tv_nut is offline
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Join Date: Jul 2004
Location: Rancho Sahuarita
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I think the mirror is crucial to brightness.

Regarding noise, the reason for theaters having a projection booth was to put the nitrate film, which was essentially explosive if accidentally ignited, into a fireproof booth. 16 mm film was made on an acetate "safety" base. If you look at old television film facilities, there were only a few that could handle nitrate film (particularly the big three networks), hence most stations used 16mm copies only.

Another thing regarding noise: when video playback systems were introduced, one point used to sell them to school systems was the lack of projector noise in the classroom (along with ease of threading, no need to darken the room, etc. etc.).
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