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Author Topic: Couple of questions about Intermittents and Platters John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 09-09-2003 12:36 PM                        Prototypes were made for several different projectors, as a direct retrofit to the existing stars and cams. Kodak had a "show and tell" with several major projector manufacturers, both in the US and overseas. Unfortunately, still no takers on licensing the technology. (Serious inquiries still welcome to contact project leader Chris DuMont). IMHO, the "Quickermittent" was somewhat noisier than a conventional 4:1 intermittent, but not excessive. The image on the screen was very steady (it's really the "dwell" of the star/cam fit that locks the sprocket in position that determine vertical steadiness). With polyester prints, the added acceleration did not produce unacceptable wear. More testing (e.g., long term run-in and wear characteristics) needs to be run, but this would be part of any commercialization effort by an interested manufacturer, since it would be specific to the tooling. Of course you can use the extra efficiency in several ways: to increase screen luminance, to go to a 3-blade shutter, to use a stopped down lens for improved depth of focus, etc. The added light might allow the use of a more efficient heat filter, so you might be able to light a huge screen without risking heat damage or focus flutter. The "Quickermittent" was one of the "Enhanced Theatrical Experience" projects, which also included a new lamphouse design, partnering with labs and printer manufacturers to improve steadiness, and the "Scope 1.5X" project revisiting Glenn Berggren's work with IscoVision.  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 09-09-2003 05:35 PM                        Is the "quickermittent" any more likely to damage film than a "normal" intermittent? I've talked to a few people who have said that the drive-in intermittents (different technology?) are excessively hard on film. Unfortunately, if something like this were to become popular, it would probably be used as a way to reduce the size of the lamphouse rather than as a way to improve image quality.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 09-09-2003 07:48 PM                        As I said, there is no problem with polyester prints. The higher accelerations will put more stress on the perfs of old triacetate prints, which may be more brittle, so I wouldn't recommend it for archives or rep houses. But the increased efficiency would normally be needed by the biggest screens, which are usually first run and using polyester prints.  |  IP: Logged Torsten Jasper Film Handler Posts: 15 From: Braunschweig, Niedersachsen, Germany Registered: Aug 2003 posted 09-09-2003 10:15 PM                    Hello, even when I check the quality in our house, I aware some flicker when I stand nearby a projector. But, when I check it in the audience room, the flicker is gone...  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 09-10-2003 12:03 AM                     One of my projectors flickers inside the booth but not on-screen. This is because it has a silver shutter blade and the light is being reflected back into the booth every time the shutter interrupts the beam. One of these days I'm gonna paint that shutter blade black.  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 09-10-2003 08:06 AM                        Flicker is usually more apparent when viewed with peripheral vision, i.e., "out of the corner of one's eye". When I travel in Europe, I notice the flicker of the fluorescent lighting and PAL television mostly when I'm not looking directly at the source.  |  IP: Logged Daryl C. W. O'Shea Film God Posts: 3977 From: Midland Ontario Canada (where Panavision & IMAX lenses come from) Registered: Jun 2002 posted 09-11-2003 02:56 PM                        quote: One of these days I'm gonna paint that shutter blade black. Depending on the size of the lamp in use, you may not want to do that. You could end up with a warped shutter.  |  IP: Logged

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