Originally posted by Jewelltrail Those kinds of lighting conditions can produce strange effects. I'm not convinced it is PF. Mike, have you tried shooting in those kinds of lights?
I knew (or assumed, anyhow) he was kidding.
Yes, the light really was purple. Different shades of red from different sides of the musicians, actually. I "corrected" the color cast for the main light, and while I could have also shifted the purples toward red/orange, or reduced their intensity, I found that doing so increased the perception of noise, so I left it alone. Plus it looks more like the actual scene felt this way.
FWIW, though, there are situations where the M135/3.5 will take situations like this and just go *crazy*, extending that purple light as a fringe around all highlights. I don't actually notice much PF in general with this lens, but combine very high contrast with purple light and it's amazingly bad. This, however, was not one of those situations.