Film-Tech Cinema Systems
Film-Tech Forum


Post New Topic  Post A Reply
my profile | my password | register | search | faq & rules | forum home
  next oldest topic   next newest topic
» Film-Tech Forum   » Operations   » Large Format Forum   » Interstellar flickering

   
Author Topic: Interstellar flickering
Connor Wilson
Expert Film Handler

Posts: 189
From: Sterling, VA, USA
Registered: Jan 2011


 - posted 11-16-2014 04:57 PM      Profile for Connor Wilson   Email Connor Wilson   Send New Private Message       Edit/Delete Post 
Having previously seen Interstellar in both 35mm and 5/70 film, I finally got to see it for a third time with my uncle at the Udvar-Hazy Center in Chantilly last night, which uses 15/70 projection. An odd thing I noticed about the presentation was that there was a noticeable flicker on the screen. And this didn't happen periodically, the flickering continued from the logos to the end. The 35mm Mosaic and 5/70 Ziegfeld shows had zero flickering whatsoever. Overall the presentation wasn't on par with 5/70, but the sound was a major step down from the Mosaic's sound system.

Could it be a large throw, bulbs at half-life, or IMAX being cheeky?

Another thing to note is that this theater, along with the two other Smithsonians in the DC area, will begin upgrading to IMAX's Laser projection system in January 2015, so I felt, faults aside, it was a nice way to send off 15/70, the end of an era.

 |  IP: Logged

Monte L Fullmer
Film God

Posts: 8318
From: Nampa, Idaho, USA
Registered: Nov 2004


 - posted 11-16-2014 06:06 PM      Profile for Monte L Fullmer   Email Monte L Fullmer   Send New Private Message       Edit/Delete Post 
If the IMAX venue used a GT projector, that 15Kw bulb in that thing is ready for a good change out.

In fact, any flickering of the image means a bulb change is in order.

Laser Projection has its issues since it's still quite new.

 |  IP: Logged

Connor Wilson
Expert Film Handler

Posts: 189
From: Sterling, VA, USA
Registered: Jan 2011


 - posted 11-16-2014 06:29 PM      Profile for Connor Wilson   Email Connor Wilson   Send New Private Message       Edit/Delete Post 
I'm pretty sure Udvar-Hazy has a GT, but can only play 2D films. I didn't check if they did have one last night. I wasn't able to see it.

 |  IP: Logged

Terry Lynn-Stevens
Phenomenal Film Handler

Posts: 1081
From: Toronto, Ontario, Canada
Registered: Dec 2012


 - posted 11-16-2014 11:11 PM      Profile for Terry Lynn-Stevens   Email Terry Lynn-Stevens   Send New Private Message       Edit/Delete Post 
Connor, the projector at the Udvar-Hazy is an SR projector. Was it the whole image that was flickering or was it just happening on certain parts of the screen?

 |  IP: Logged

Monte L Fullmer
Film God

Posts: 8318
From: Nampa, Idaho, USA
Registered: Nov 2004


 - posted 11-17-2014 02:18 AM      Profile for Monte L Fullmer   Email Monte L Fullmer   Send New Private Message       Edit/Delete Post 
SR's carries a 7500w bulb.

 |  IP: Logged

Ivan Plamondon
Film Handler

Posts: 42
From: Welland, Ontario, Canada
Registered: May 2013


 - posted 11-18-2014 09:56 AM      Profile for Ivan Plamondon   Email Ivan Plamondon   Send New Private Message       Edit/Delete Post 
I'm willing to bet it was a lamp issue. I have seen my share of flickering and it usually develops during the last week of the lamps life expectancy. Ours in Niagara is an GT with an air-cooled 7KW Superior or USHIO lamp.

Watched Interstellar at IMAX Mississagua with a fairly new lamp in their SR projector (15/70). Very little flickering and an awesome film to see!

 |  IP: Logged

Marcel Birgelen
Film God

Posts: 2610
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012


 - posted 11-19-2014 06:39 AM      Profile for Marcel Birgelen   Email Marcel Birgelen   Send New Private Message       Edit/Delete Post 
You've seen the fashionably late Halloween version of Interstellar, with increased flickering for dramatic effect.

quote: Terry Lynn-Stevens
Connor, the projector at the Udvar-Hazy is an SR projector. Was it the whole image that was flickering or was it just happening on certain parts of the screen?
What kind of defect would cause a "partial flickering image" in a film presentation?

 |  IP: Logged

Mark Strube
Master Film Handler

Posts: 306
From: Milwaukee, WI, United States
Registered: Feb 2007


 - posted 11-21-2014 05:24 PM      Profile for Mark Strube   Author's Homepage   Email Mark Strube   Send New Private Message       Edit/Delete Post 
I've seen this "partial flicker" before with an IMAX in Houston. I'd imagine a dying bulb that needs to be replaced (or re-tuned until it can be replaced).

 |  IP: Logged

Bobby Henderson
"Ask me about Trajan."

Posts: 10701
From: Lawton, OK, USA
Registered: Apr 2001


 - posted 11-22-2014 09:58 AM      Profile for Bobby Henderson   Email Bobby Henderson   Send New Private Message       Edit/Delete Post 
I saw very little flicker at all with the IMAX version of Interstellar I watched in Austin.

 |  IP: Logged

Victor Liorentas
Jedi Master Film Handler

Posts: 796
From: london ontario canada
Registered: May 2009


 - posted 11-23-2014 11:10 AM      Profile for Victor Liorentas   Email Victor Liorentas   Send New Private Message       Edit/Delete Post 
No flickering at the Henry Ford Museum 15/70 Imax. The image was bright,clean and wonderful!
The sound levels were perfect!

 |  IP: Logged

Marcel Birgelen
Film God

Posts: 2610
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012


 - posted 11-23-2014 03:43 PM      Profile for Marcel Birgelen   Email Marcel Birgelen   Send New Private Message       Edit/Delete Post 
quote: Mark Strube
I've seen this "partial flicker" before with an IMAX in Houston. I'd imagine a dying bulb that needs to be replaced (or re-tuned until it can be replaced).
Since a Xenon bulb is mostly a point source, deformed by lenses and/or mirrors, a "partial flicker" is all but unlikely.

Surely, flicker will be more evident in the bright parts of any image, but I cannot think of a failure mode where there would be more flicker, e.g. in the bottom left part of the image than the rest of the image.

 |  IP: Logged

Jonathan Goeldner
Phenomenal Film Handler

Posts: 1330
From: Washington, District of Columbia
Registered: Jun 2008


 - posted 11-24-2014 11:47 PM      Profile for Jonathan Goeldner   Email Jonathan Goeldner   Send New Private Message       Edit/Delete Post 
I didn't notice any flicker at the Smithsonian's Air & Space's Lockheed Martin IMAX Theater - I thought the overall experience was pretty spectacular (aside from the music score sounding like it needed to be heard from folk outside of the auditorium).

As to the Smithsonian conversion to laser projection - only Udvar Hazy and Samuel C. Johnson IMAX Theater (at the Natural History Museum) are closing in January - the Lockheed will remain 15/70 til the museum starts it's renovation that is supposed to be completed in 2016.

 |  IP: Logged

Mark Campbell
Expert Film Handler

Posts: 139
From: Seattle, WA USA
Registered: Jul 2007


 - posted 11-29-2014 01:10 AM      Profile for Mark Campbell   Email Mark Campbell   Send New Private Message       Edit/Delete Post 
No flicker at the Boeing IMAX in Seattle. 15/70 presentation was flawless.

 |  IP: Logged



All times are Central (GMT -6:00)  
Post New Topic  Post A Reply Close Topic    Move Topic    Delete Topic    next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:



Powered by Infopop Corporation
UBB.classicTM 6.3.1.2

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.

© 1999-2018 Film-Tech Cinema Systems, LLC. All rights reserved.