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Author Topic: Unusual projection problem Thomas Pitt Master Film Handler Posts: 266 From: Leeds, West Yorkshire, UK Registered: May 2007 posted 03-29-2018 02:14 PM                     I went to see Ready Player One today, but the auditorium seemed to have a strange issue with its projector. The bottom half of the screen was fine, but the top half had a 'double vision' effect, as if the image was being projected twice but out of alignment. It's a bit like when you see a 3D movie without glasses, but odd that it was only affecting the upper half of the screen. The problem persisted through the trailers and even when the system went into 3D mode (with scope lens) for the actual movie. The 3D effect still worked, but after a while the double-vision became very distracting. I was told they were having some issues with the projector and couldn't fix it, not even by restarting the system - so everyone went out to get a refund. Any ideas what could have caused this?  |  IP: Logged Ken Lackner Phenomenal Film Handler Posts: 1907 From: Atlanta, GA, USA Registered: Sep 2001 posted 03-29-2018 03:11 PM                     Do you know what type of 3D system the auditorium uses? This sounds like a misalignment of a Real D XL. If that is the case, the theater should contact their service technician to fix the issue. If the theater doesn't use Real D, it is still almost certainly an optical issue, not an electronic one, and rebooting the projector would not fix it.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 03-29-2018 03:40 PM                     Whenever you see something like that, you should inquire right away what kind of projection and 3D system they use. - Carsten  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 03-29-2018 07:33 PM                     Wonder if the location uses Sony Twin Lens and one of the RealD polarizer panels went out of alignment....  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 03-30-2018 07:43 AM                     Isn’t it possible to infer the type of 3-D system by looking at the glasses? For instance, holding two pairs up together and turning them to see which way the polarization of each lens goes? Dolby should be a gimme. Right?  |  IP: Logged Thomas Pitt Master Film Handler Posts: 266 From: Leeds, West Yorkshire, UK Registered: May 2007 posted 03-30-2018 03:09 PM                     It is indeed a Real-D system (I have not seen Dolby at any UK theaters yet). It looked like there was a Z-Screen in front of the projector but again, can't be sure. The double image affected both the 2D adverts/trailers and the actual 3D movie.  |  IP: Logged Frank Cox Film God Posts: 2234 From: Melville Saskatchewan Canada Registered: Apr 2011 posted 03-30-2018 03:44 PM                        If it's a Z-screen then the problem is likely a ghost image that's being reflected between the Z-screen and the port glass. I had that issue; the fix was to tilt the Z-screen vertically such that the ghost image is projected on the ceiling instead of the screen.  |  IP: Logged Jason Metcalfe Expert Film Handler Posts: 134 From: Austin, TX, U.S. Registered: May 2010 posted 04-03-2018 08:39 AM                     Could also be incorrectly configured ghostbusting, like someone calibrated it from a single point in the room  |  IP: Logged

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