One Hour at Aspen Alley 2010 ©2010 Alan Schrank
To get a test exposure I set the ISO on my camera to 6400, then a exposure that take 10 seconds would equal a 10 minute exposure at ISO 100. The moon was full, I was at f8.0 and was getting about 55 seconds high ISO exposures. I set my ISO back to 100, locked my remote cable release and climbed back into my car... 55 minutes later, nope too dark. Try again, ... still too dark.
This is my third attempt, some time while snoozing in my car, someone drove down the alley. I know, not because I saw them, (I didn't, I was asleep), but because I captured it here.