I have been trying to get more keepers as I shoot my daughters High School tennis team. These latest are shooting AF-C single area along with center weighted metering. All shot with my D70 and Tamron 80-200 2.8. Working on the better half to get a D300 but until that happens I will be using my D70. How do these look for focus and sharpness. I didn't do any post processing on them.