A fairly mild dispay of aurora in the darkening deep blue twilight over the lake at Police Outpost Provincial Park, in southern Alberta, on September 26, 2016, with the stars of Perseus rising, and with Capella low in the northeast at centre. This is a stack of 4 x 20 second exposures for the dark ground and water to smooth noise and one 20-second exposure for the sky, all with the 25mm Canon lens at f/2.8 and Canon 6D at ISO 2000. Taken with dark frame LENR on.
The Milky Way over the distant Prince of Wales Hotel from Driftwood Beach, in Waterton Lakes National Park, September 24, 2016. Being at the end of the season, the hotel is closed and dark. The bright star at centre is Altair in Aquila. This is a stack of 4 x 30 second exposures, mean combined, to smooth noise, and one 30 second exposure for the sky, all with the Sigma 20mm lens at f/2.5 and Nikon D750 at ISO 6400.
The Big Dipper and a diffuse aurora over the old barn near home, in southern Alberta, on September 16, 2016. The waning gibbous Moon off camera at right provides the illumination. This is a stack of 5 exposures, averaged, for the ground to smooth noise and one exposure for the sky to keep the stars untrailed. All 13 seconds at f/2.8 with the Sigma 20mm lens, and ISO 1600 with the Nikon D750. Diffraction spikes on stars added with Noel Carboni’s Astronomy Tools actions.
