My Nikon D 7100 just arrived about 4:40 this after noon. What I don't like is no my menus but can live with it. No LCD screen cover. That worries me. The rest of the cameras is fine so far. Faster focus and seems right on. But didn't test in low light yet. I will get out side and shoot to see what I get. I want to try my 35 mm f/1.8, 50 mm f/1.8, 85mm f/1.8, 80-200 mm f/2.8 and Tamron 200-500mm that I shoot the moon with. Might try that tonight if the moon is out. How do I calculate what 500 mm comes out at 1.3 crop? I know the 1.5 crop calculations.