John Francis wrote: > 123456789 123456789 123456789 123456789 123456789 123456789 123456789 12345678
(I used to use that trick a lot.) > One one costume, though, I noticed an extreme colour shift. It > was made of blue velvet material (about the colour of Sexy Kitty > for those who watched the most recent episode of CSI). But on > the captured image the material comes out bright purple! First, Google for "anomalous reflectance". I've read about the effect on film before, and apparently there are certain fabric/dye combinations that are a real PITA for catalog photography because of it. (Or maybe you don't have to, since you already have a handle on the cause. But I found it interesting reading the last time I dove into the subject.) Second, I've seen this in a (very cheap) digital camera a few years ago, but only with flash shots. Purple eggplant on the vine came out looking like shiny blue latex balloons! In that case it was a strange glitch in the white-balance software, which I thought was a bit odd since it only showed up with the flash. -- Glenn