I took a job taking photos at a dirt track. The lighting there is terrible, and I need advice. (this problem comes into place after it gets dark outside) The problem: In about 1/2 the track, lighting is terrible. The only way I am able to achieve decent results, is to use my 70-200 lens in 2.8 aperture the whole time. In addition, 1600 ISO... When I hook up my flash, it works well, for about 1/3 of the track. The other 2/3 of the track is too far away, and the flash only lights up the dirt in the air...so my pictures end up 90% brown. Most of my pictures are F2.8, 1600, and 1/50 shutter. The 1/50 shutter is slow for taking pictures of speeding racecars. I use a monopod which eliminates up/down blurs. Restated: My best option, is to use 2.8, 1600 without a flash, with a monopod, and I acheive decent results on most of the track. ************** I would like to be able to take faster pictures, so that I can get decent shots on ALL of the track. Any ideas? Good lenses, good settings, tips, etc? ************** Here's what I own: Rebel XT, stock lens (i dont use it for this), a Sigma 70-200 2.8 DG HSM, a Canon 430EX flash. I tried a canon 17-85 IS lens, but i gave up on that real quick since at 85, the aperture is 5.6, causing a 1/13 shutter. Single-mode IS doesn't seem to help with fast-moving objects.