Late October and an early rise to get to the Arch before sunrise from Moab. On arrival I was amazed that the area was already over loaded with photographers though it was still dark but I got in line and finally managed to get what I was after. Camera was a Canon 5D Mk III with a 16-35 f2.4 lens set at 20mm on a tripod. Settings as follows. Aperture was f18, speed was 1/5 sec and ISO was at 100.