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Topic: Problem with "The Deep End"?
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 09-04-2001 01:13 PM
Mitchell said: "From the beginning and through
all the reels there was a blur of light (ghosting?) across the top of the screen. At first I thought it was a projection
problem, maybe the shutter was not timed properly. Even though it was on every reel, it was not on every camera
shot. Now I wonder if it was in the printing, or maybe, from the camera itself. Perhaps a registration problem."Sounds like travel ghost. Having a shutter slightly out of phase with the pulldown will cause travel ghost, and can occur in EITHER the camera or projector. Since no one else saw a problem in other prints, I suspect that the shutter timing is just slightly off on your projector, so you see the ghosting in scenes that are particularly critical (bright light areas against a dark background). Try changing the shutter timing to see if you can get rid of it. If you can't adjust it out and the streaking changes to the other side of the light areas, and moves to the bottom of the screen, your shutter is not wide enough to cover the pulldown, or there is too much play in the drivetrain. ------------------
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 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
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