Just thought you might like to see a shot I took Sunday of a fruit bat in virtual darkness with my D300 and 105 VR Macro f/2.8 The shot is taken like this: 1/25th, f/3.0 (the 105's actually are variable f/2.8 to 3.5), 6400 ISO, I shot it center weighted metering, no flash, auto white balance (what is the proper white balance for virtual darkness?), VR on. The blurriness was from the animal moving a bit, I handheld it but I had the Macro up against glass with the VR on, so it was pretty steady. The animal was eating and swaying just a bit. The only PP done is just a tad bit of cropping to square it up. Noise is present, but it was either take this or get nothing. I shot this (and a bunch more in virtually no light) and the camera autofocused perfectly... with both the 105 VR and the 70-200 f/2.8 VR. It was so dark I couldn't see the through the finder well, I had to guess where to put the focus points and wait until they turned red to see them.