I took a bunch of photos at my son's martial arts club using a D90 with a 50mm F1.8. The club is lit with overhead fluorescent lighting, and I was getting some weird results where some shots are "white", others have an "orange cast", and still others are partly white and partly orange in the same shot.
I suspect it has to do with the combination of the frequency of the light flicker and with the camera shutter speed. Here is a sequence of 3 shots that show the problem. The shots were taken with 1/500s at F2 and ISO-800 and with Auto-WB.
First shot ("white/normal"):
Second shot ("orange cast" at top):
Third shot ("orange cast" at bottom):
These were taken in burst mode within a second of each other.
Can anybody tell me what is going on? And, how I can avoid this?