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Topic: How much time left for film?
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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99
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posted 06-02-2008 03:31 PM
quote: Mark - I'm interested to know what your observed light output at the beginning and end of the CDXL-30's 2500 hour life. I've tracked 2 in 2 separate CP2000Hs and shown a significant drop in light output after only 900 hours - i.e. 110% power at install yielded 24FL and now barely 13FL (yes, the initial install was set for 14FL and the lamp has been refocused weekly), I've seen a similar drop with the CDXL-20 lamps - so far my CDXL-60 and CDXL-45 tests are not showing the same drop.
I have not checked them as of yet but will be doing so in a few weeks, there is now 6 months running time on them. I'll post the results then. If there was that much light drop over the amount of time you say I know that this customer would have called us to change out the lamps, he is very light conscience. The interesting thing about the sooper dooper CDXL lamps is that they are not designed to put out any more lumens... They are designed to maintain the stated number of lumens over the stated life of the lamp whilst running at full power. I will be experimenting with the new 6kw sooper dooper lamp in a couple of weeks. We are replacing an Iwerks 15/70 system with a stacked Christie CP-2000 system... and those tests should be interesting to say the least. We already ran preliminary tests on the existing 82X62 foot 1.8 gain screen and the results with just one CP-2000S had almost triple the light on the screen that the aging Iwerks 15/70 could muster running with a 7kw lamp. With stacked CP-2000Ss we should have no trouble maintaining 14fl over the lamp life in their format running 6kw lamps.
The interesting thing here is that now we have a whole bunch of Imax and Iwerks theaters knocking on our door for this system(which does involve some custom optics). Once they learn they can own a system that will perform perfectly satisfactorly, learn they can cut back the labor involved in operations, learn they can save the rediclous Imax/Iwerks maintainance expense and royalties its a simple no brainer on which way to go.... To boot, many large format films are already available in Digital format. For the theater above they have put 14 years of hard use on their 15/70 system and the projector is simply wearing out and not worth the high cost of upgrading the lamphouse and repairing the rotor, feed shoes, sprockets, new 15/70 prints, etc.
Mark
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Mike Blakesley
Film God

Posts: 12767
From: Forsyth, Montana
Registered: Jun 99
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posted 06-02-2008 04:12 PM
quote: if it adds several hundred thousand dollars to your bank account over several years it's not such a bad gimmik after all!
I would like to interview a few hundred patrons at a 3-D movie and ask them, if this movie had NOT been released in 3-D would you have come to it anyway? I'll bet the answers would consist mostly of:
1. Sure, who cares if it's 3-D? 2. Yes, we didn't even know it was in 3-D until we got here. 3. Yes, in fact I'd like it better because I wouldn't have to wear the stupid glasses. 4. Yes, because then we wouldn't have to pay the extra cost. 5. Yes, because then I wouldn't have this headache.
There might be a few "no" answers, but I'll bet they would be in the minority.
Just for the record, I'm all excited about digital cinema and look forwad to it and plan to get it, but damn, that 3-D thing just leaves me cold.
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