Here is a picture I took just fucking around from 2103ft (0.4miles) away from the lake. Here is the google map to prove it. This was with a D70 + 2x Kenko + Sigma 70-300APO Super Macro II. The setup comes out to 900 and is useless...but kinda fun to fuck around with. I want to get a nice sunny day and take some pictures of traffic on the highway and see if I can see inside someones car.