Noctilucent clouds on northwest horizon, amid evening twilight, July 6, 2011. There is also a time-lapse movie taken the same night. Taken with Canon 7D and 16-35mm Canon zoom lens at 20mm for 10 seconds at f/4 and ISO 400.
Noctilucent clouds low on northeast horizon, amid pre-dawn twilight, July 6, 2011. Taken with Canon 5D MkII and 8mm Sigma fisheye lens for 25 seconds at f/4 and ISO 400. Taken at 3:43 am MDT. Latitude 50.9° N.
Noctilucent clouds low on northeast horizon, amid pre-dawn twilight, July 6, 2011. Capella in upper right of frame. Taken with Canon 7D and 16-35mm Canon zoom lens at 24mm for 10 seconds at f/4 and ISO 400. Taken at 3:35 am. Latitude of 50.9° N.
