Mt. Princeton's Chalk Cliffs and the Collegiate Peaks by Moonlight. October 27, 2012. 8:01:23 PM MDT (local time). (10:01:23 PMEDT - camera time - 22:01:23-04:00). Canon 5D Mark III. Canon EF24-105mm f/4L IS USM at 24 mm. 30.0 sec; f/5.6; ISO 800.