All right, everyone, please help me understand how this one had so many things go wrong with it and what I can do to improve in the future.
What you're looking at:
Pacific International Raceway's dragstrip, shot from behind the staging area to the right of the track. Two cars have just completed their run on the left side of the photo, and the scoreboard on the right is for the right-hand lane, and is showing the E/T (elapsed time) on top and trap speed on bottom.
Vital Statistics:
Camera: Canon Digital Rebel XT
Lens: EF 70-200L f/4.0
F/L: 200 mm
Aperture: 4.0
ISO: 1600
Mode: Manual
What's wrong:
Look above the right-lane car. There's a lens flare from the scoreboard visible on the right. You can even make out the E/T and trap speed in the lens flare image. There are other flares from the other cars making their return drive on the right as well. Also, very noisy. Yes, I was using ISO 1600, and I know a lower one would have resulted in less noise, but I don't see how I could have gone down on the ISO without widening the aperture (wide open already) or lowering the shutter speed (motion blur results).
Please assist me in improving this type of shot. I love going to the Test & Tune nights, you get everything from grocery-getters to hand-built dragsters there, and I love seeing them all tearin' it up! Let me know how I could improve this with existing materials first, and then equipment upgrade suggestions, please.
PS: That blue-and-white car that's making the 13.70 quarter mile? That's my wife in our Mustang! 

