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This topic comprises 2 pages: 1 2
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Topic: "Solo" projection problems leave movie fans in the dark
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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 06-01-2018 04:45 PM
Note, Communicator is only going to be as accurate as the person that calibrated it. And, it will be most accurate around the point of calibration. Naturally, it can't account for anything degrading the light after the sensor (which is at the fold-mirror) so any dust on the prism, lens and screen condition are not factored in.
If you are having issues with dark scenes, I do really suggest lowering your gamma just enough until the problem subsides. Instead of 2.6, perhaps 2.4 or 2.3 will solve the problem. It will be just like getting a "drive-in print" again. Except you are customizing for the needs of YOUR theatre.
With Barco, however, without the Post Production version, you can't create your own gamma files (LUT-DG) and the ICP software is no help there either (it was in series 1, oddly enough). However there are files available and if you want to experiment, email me and I'll get something to you. It won't break anything and you can always go back to factory.
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Leo Enticknap
Film God

Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 06-01-2018 07:11 PM
quote: Steve Guttag Wow, way to advocate for mediocrity. But seriously, what are the "real world" light levels? Have you compiled what the average real-world light level actually is? If not, how do you even create content for it?
I'm not advocating for mediocrity. I'm simply pointing out that it exists, and that we have to deal with it. I wish that every cinemagoer was as discerning as Chapin, and voted with their credit card whenever they encountered a dim, blurry, and/or overly cropped picture. Far from advocating for mediocrity, I'm always trying gently to persuade my customers to make a small investment here or a strategic upgrade there, that will deliver a significant improvement in their picture and/or sound. Sometimes I succeed, sometimes I don't.
I agree that a large scale survey of real world light levels could potentially be very useful. If you sent someone into, say, 1,000 screens across the country, asked them to project a peak white DCP and took a reading, the results would be interesting, to put it mildly. I have a totally unscientific, gut feeling, based on all the theatres I've been into (either for work or as a guest or customer) in the six years since I moved to America, that the mean average from a digital projector would probably be around 10 to 12ft-l.
I believe that the fact remains that by originating content that really needs the full 14 to look acceptable, even to an untrained eye, you're taking a significant risk.
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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 06-04-2018 11:13 AM
If the movie was tested in a room that met specifications (and it did), then there is nothing experimental about it.
The thing is, the SMPTE specs allow for a +/- 3fL in the center (with the same percentages on the sides/corners). That is, one should be able to play the movie at 11fL and no critical detail should be lost.
Possibly, they never checked the movie on the worst case theatre to verify that it was still watchable (just speculation).
Sure, screening rooms will be 14fL +/- 1 (and more like +/- 0.5fL) but a theatre that meets specs should be able to show the movie and not lose critical data (sure, you'll lose some detail).
Even recording studios have Yamaha NS-10s to simulate a "typical home speaker" of no particular quality to ensure that the mix will be acceptable on that sort of system too (ever notice that most every picture of a recording studio has those bookshelf speakers with the white woofers sitting atop the mix board riser)?
https://www.soundonsound.com/reviews/yamaha-ns10-story
However, I absolutely reject the notion that Hollywood should cater to the least common denominator. If you only put out 8fL, and the screen isn't obscenely huge, you probably shouldn't be showing any movies, Solo or otherwise.
14fL +/-3 is the spec in the center with a "generous" 70% requirement on the sides/corners. It isn't a hard spec to meet (with low/no gain screens).
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