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This topic comprises 2 pages: 1 2
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Author
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Topic: Why single lens holder?
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Steve Guttag
We forgot the crackers Gromit!!!
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Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 11-11-2002 07:50 AM
Lens turrets are only really popular for multiplexes. They act as lens holder as well as lens cabinet. While there is a great feeling of flexibility with them since you can adjust for perfect center on each format, they rarely keep their adjustments. On American machines, single lens holders got a bad rap for being out of round so no two insertions put the picture on the screen in the same place. This really isn't the case anymore. Furthermore, with PC adapters (used instead of lens adapters) the single lens holder can have all of the flexibility of the turret but with an infinate number of formats available. Given the choice, I'll go for single lens holder EVERY time. However, it depends on the booth personel too...Scope lenses were heavily abused by incompetent operators in the single-lens holder days. Funny, we don't have this sort of problem in the screening room type booths. Steve ------------------ "Old projectionists never die, they just changeover!"
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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 11-11-2002 08:36 AM
In most cases, with the general availability of both "flat" and "scope" trailers, it is possible to make up a show having only one format, and requiring no lens/aperture change during the show. When you have a mix of formats in an automated situation, a turret and aperture changer are needed, along with automated screen masking.------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243 e-mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion
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