Sunrise clouds

From my last observing run, this was taken just after sunrise. The mountains in the distance are the Santa Ritas where the Whipple Observatory is on Mt. Hopkins (the right of the two prominant peaks - the left and tallest is Mt. Wrightson). The MMT is on the top of Mt. Hopkins and several other telescopes are on a flank to the south (right). This image was taken at 70mm focal length with an exposure of 1/1000 seconds at f/8, ISO 800.