New D70 user, i took this in full sun w/ a polarizing filter. However the tree/bushes in the bottom of the pic are very grainy. And the roof is washed out. I've noticed that many of my pics are turning out "grainy". Too low iso? Increase my aperature? Any suggestions greatly appreciated... also some flaming due to DSLR noob + crappy pics is also expected. Let the comments commence!