my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Silver Screen and Dual Projector 3D (Page 2)

This topic comprises 2 pages: 1  2

Author Topic: Silver Screen and Dual Projector 3D Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-09-2011 06:16 PM                     As for dual projector 3D in the digital world...same files work for either single or dual projector...as it is, the player is sending out two different signals...so in a dual projector, one goes to each (unless you have a dual-dual player in which you can send 4:4:4 to each...the IMBs will allow 4:4:4 on 3D as well). -Steve  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 12-09-2011 06:59 PM                     Sony licensed Panavision for their Split-Lens as well, so they now have a choice for non-metallized screens as well. @Jack: There is a thread in this forum dealing with silver screen paint and that some/most IMAX 3D screens have been painted on location because ist was impossible or too expensive to ship silver screens that large. But I think the results are suboptimal compared to todays high-performance silver screens from Stewart or Harkness. Everyone hates silverscreens, so one should probably get the best currently possible in order to reduce the known sideeffects. - Carsten  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 12-09-2011 08:34 PM                        Jack: on digital PAINTING is not-an-option; precluded by contract. Louis  |  IP: Logged Jack Theakston Master Film Handler Posts: 411 From: New York, USA Registered: Sep 2007 posted 12-09-2011 10:01 PM                     Sorry, I should have been more specific—my theater is interested in running 35mm 3D (revival, not 1st run), but we've got a large screen (40x20) and we're weighing the financial difference between painting and getting a new silver screen all together. In our case, we're not as worried about side seating fall-off, since the house is fairly narrow.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-10-2011 07:38 AM                     Imax has been the best at painting but they put up an automated paint rig to get an even coverage. I have NEVER and I mean NEVER seen a good hand painted silver screen...they are all uneven. Also, one has to block off everything behind the screen. I would definitely recommend replacing the screen if you want good results. -Steve  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 10-29-2014 03:51 PM                 It has been 1054 days since the last post.  |  IP: Logged Alejandro Mir Film Handler Posts: 3 From: Buenos Aires, Argentina Registered: Aug 2012 posted 10-29-2014 03:51 PM                        Hi all, I recently installed a large dual 3D projection system with two Barco DP4K-32B and Dual IMB Showvault, using Schneider circular polarizers. The screen is an MDI Stereoview 2.8 gain, size 75`x40` and the throwing distance is 90`. Everything seemed perfect until we played subtitled trailers... Hobbit and Exodus... there was a terrible ghost, very noticeable. I performed all the usual checks: confirmed each projector delivers the correct image, removed the porthole glasses to avoid any depolarization, checked another piece of silver screen surface, checked that the Master Image glasses match the polarization system, but the problem persists. There's no doubt to me that the image from one eye is crosstalking to the other one. I measured a crosstalk rate of 22 with the Shcneider polarizers, also tested Master Image polarizers and the rate was 43. The ghost was sligtly lower, but still unusable. I also tested linear polarizers and glasses, getting a rate of 75 and a barely acceptable ghost, but still not too good. I've done few duals before and never seen this... I already tried everything posible without success... Does anyone knows what the reason may be? Am I reaching the limit of the polarizing system? I doubt so... Any suggestion? regards Alex Mir Argentina  |  IP: Logged Marcel Birgelen Film God Posts: 3357 From: Maastricht, Limburg, Netherlands Registered: Feb 2012 posted 10-29-2014 06:11 PM                     I doubt people really appreciate cross-posting while also reviving an old topic about 35mm 3D in the process. Furthermore, I do think the Digital Cinema Forum is much more suited for this discussion.  |  IP: Logged

All times are Central (GMT -6:00)

This topic comprises 2 pages: 1  2

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.