not your typical e-510 noise problem thread...

[xwingkiller]

i was out shooting some softball games for fun this last weekend. as im going through my files, i noticed that there seems to be a lot of noise even though im shooting at iso100 and mostly at 1/800 sec. i dont know if it is a ton of noise or not, but to me it seems like it is. i am new to dslr though so im not too sure. the worst parts seem to be on people's skin...arms, legs, faces...

here's a couple of examples of what im seing. this is 100% crop. overall it wasnt a big deal because i pretty much used everything around 1024x768 size for putting on the internet.
i was just wondering though if these pictures should be useable at 100% size or if the higher resolution is really just to make it so your 50% crop would be a larger useable image than a lower resolution sensor.