On 30 November I shot some horse races at Towcester. There were six jumping races, half hurdles (low brushwood fences) and half steeplechase (higher fences), and a flat race at the end, for which the light was too bad for decent photography.
We picked various fences to shoot, depending on the type of race and the light. Each of our fences was jumped twice in each race, with the action taking about five seconds the first time, and ten to fifteen seconds the second time as the horses spread out. That meant a total of less than two minutes shutter time for the whole afternoon.
Most of my photos were taken with the 50-140, a few with the 100-400. I regretted forgetting to pack the 16 and 35, because there were some good opportunities for wide angle shots which I could not exploit.