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This topic comprises 3 pages: 1 2 3
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Topic: Masking Tape Aperature Plate
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John Pytlak
Film God
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Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 11-28-2000 06:48 AM
Must be interesting when they change between "scope" and "flat" --- do they have automated tape changers? ![](http://www.film-tech.com/ubb/wink.gif) Not using an aperture plate in the projector also throws alot of additional "stray" light into the lens, killing contrast. There is nothing really wrong with using opaque (black) tape or black cardboard to control stray light, and keep it from hitting the screen, but it should not be used to replace properly sized aperture plates. Non-opaque masking tape is probably throwing alot of stray light into the theatre as well. For more on "contrast killers": http://www.kodak.com/US/en/motion/newsletters/reel/december99/pytlak.shtml My next article in Kodak's "Cinema Notes", "Caring About Composition", discusses the need to maintain proper image size and masking. ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Eastman Kodak Company Research Labs, Building 69, Room 7419 Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com
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John Walsh
Film God
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Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999
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posted 11-28-2000 10:46 AM
Yeah, I've seen and used tape on the window, too. You have to give those people in Mass. a little credit; I've also seen places that didn't bother to mask the image at *all*Maybe, someone could be nice and send them a used aperture plate they don't need that is already too open. While it wouldn't trim off the screen, it would at least prevent the light from shinning all over the inside of the booth - better than nothing! Personally, I like to use black electrical tape, as it sticks well and comes off cleanly (unlike the "remove within 24 hours" cheap stuff.) When we first installed DTS, we quickly found which apertures were filed to far, and had to use tape to clean it up until new plates could be ordered and installed.
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