my d700 was used last night for the first time set on an iso of 350 and the photos were VERY grainy. This is scary since the d60 didnt do this. I'm using a DX 50mm lens until the full frame version arrives next week that I've ordered. Is it the lens causing this to happen? is it that my lens isnt clean enough? regardless the entire photos are grainy which worries me. Any help would be GREATLY appreciated!