hi can anyone tell me the best settings to put my d70 on as i manly take sport/wildlife and as you can tell a bit green still got to start somewhere i manly use the sigma135-400 on a trypod and set the iso between 400-500 depending on the light not really shore what else i need to do i have bought a sb800 as i was told this might help with the light and i set the d70 on sport mode and have tryed it on auto but the reasults are average can anyone tell me what to set it on for this lense