If you put a white diffuser in front of the lens, or better yet get a diffuser/lens cap like video cameras used to have, you could point the camera at the light source and perform a custom white balance.
Regards, Anthony -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bruce Walker Sent: Tuesday, 17 February 2009 11:02 AM To: Pentax-Discuss Mail List Subject: Colour temp of LED stage lighting ... ? 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? -bmw -- 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.
