Ive been asked short notice to do a shoot tonight at a lake near by, the event is a canoe combined with cable pull kinda event. Pics will make sense. Basically im shooting a lake where canoes will go past approx 25-35 mph on a relativley set path so i can prefocus to save time. I only have the a100s two kit lenses so they are not too fast to be honest (18-70 and 70-300) I will be using a tripod and light will be moderate its around 6pm so daylight but without the midday sun )if we get any, its overcast at the moment!) Focal range will be at the corners of the lake so closest i can get is probably about 20 meters away. I need tips and advice from your knowledgable minds!