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» Film-Tech Forum ARCHIVE   » Operations   » Digital Cinema Forum   » Barco DP2K-6E single lamp mode

   
Author Topic: Barco DP2K-6E single lamp mode
Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 05-03-2019 01:35 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
I just put in my first DP2K-6E (in a mixed AV/DCP situation where the projector sits in the room and is replacing the conventional A/V projector so they can gain DCP capability.

So the the projector shows that one can go to single-lamp mode and choose top or bottom lamp but when I try those settings...nothing appears to change.

I have too much light on the screen (over 20fL) and since the S2K machines have miserable contrast, the extra light also gives me extra "greys" instead of a black (is is quite aware that FLAT doesn't fill the imager in width as well as Scope not filling the image in height). The room does not have a conventional screen, let alone masking.

Macro creation does not allow for altering lamp modes either! And why can't these projector companies allow the DCinema projectors with HMI lamps to allow for alternating lamps on each turn on to balance them out rather than just choosing which lamp to use. If it is due to color balance, we can always set up multiple MCGDs and it should be a simple matter to assign the Top MCGD to just when the top lamp is running. Likewise for the bottom.

So did I miss something on the single/dual lamp mode? I've looked through the various manuals and it is not discussed (from what I can find).

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Carsten Kurz
Film God

Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 05-03-2019 02:26 AM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
Hmm. I use dual vs. single regularly, switching modes in communicator. Do you use CLO mode? I use manual/power mode.

- Carsten

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Marco Giustini
Film God

Posts: 2713
From: Reading, UK
Registered: Nov 2007


 - posted 05-03-2019 02:33 AM      Profile for Marco Giustini   Email Marco Giustini   Send New Private Message       Edit/Delete Post 
I suspect the reason for the inability of switching lamp mode via macro is that those lamps will take time to switch on and they’ll show green light while warming up so it kind of makes sense to me.
Same for alternating lamps, those lamps will require more colour correction than Xenon and colours will drift with time so switching lamp may give you the wrong colours on screen (not by much, ok, but this is still a DCI machine after all).

Yes, Sony changed the software to allow this on their 500 series projectors. But I see that as a can of worms to be honest.

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