On 16/2/09, Bruce Walker, discombobulated, unleashed: >As I'm encountering LED stage lighting more and more, and as my trusty >K100D Super doesn't include a WB setting for them, a question for the >physicists and lighting gurus on the list: what is considered to be the >colour temperature of typically available LEDs? Is there a recommended >near-enough equivalent setting among the WB choices? > >When I run pix through ACR after the shoot, I find that I'm getting >more-or-less reasonable results with ACR's temp/tint sliders near their >extremes; eg 2000/-128 or else something like 11,500/-64. > >(I'd love to sneek up onstage before the show and attach a grey card to >something so I could keep calibrating during the performance. >Sometimes I'm lucky and there's a greyish keyboard onstage I can refer to.) > >I suppose that LEDs present an near-impossible task since they are made >up of clusters of green, red and blue LEDs whose brightness is varied to >get the desired colour. I expect that the colour-temp of each >colour-type of LED is different. > >Anyway, anyone have a suggestion?
I assume you mean stage lighting of differing colours - perhaps pulsating to music or changing mod settings. When filming a stage setting, usually during a rehearsal in my case, if it's the former I will use a preset 3200k setting (tungsten). If it's a scene that is fairly steady yet with constant lighting, I will use a different preset - either half-blue (about 4600k) or full blue (daylight, anywhere between 5600k and 9000k usually). I can see the result instantly on a small colour monitor. That said, I try not to destroy the concept on stage that is being offered. For instance during a scene in a cave, the light was very blue - but to take a white balance under those conditions produced a very neutral scene on the video and completely lost the mood. I pulled it back a lot and split the difference, keeping the cold blue creepy feeling. Of course, for stills this may apply differently. If it was me I would shoot RAW and adjust in post processing, trying to keep it faithful to the mood..... HTH -- Cheers, Cotty ___/\__ || (O) | People, Places, Pastiche ||=====| http://www.cottysnaps.com _____________________________ -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
