The Big Dipper (at right) and Arcturus (at left) above the treetops at Forget-Me-Not Pond at Kananaskis, Alberta, June 26/27, 2016, in the deep blue of summer solstice twilight. The “arc to Arcturus” path from the Dipper down to Arcturus is well-shown here. This is a stack of 4 exposures for the ground to smooth noise, and 1 exposure for the sky, all 25 seconds at f/2.2 and ISO 3200 with the Sigma 24mm and Nikon D750. Diffraction spikes added with Astronomy Tools.
The Big Dipper (left), Polaris and the Little Dipper (centre top), and Cassiopeia (right) over Emerald Lake, Yoho National Park, BC. Lights from Emerald Lake Lodge illuminate the trees. The light from perpetual summer twilight lights the sky deep blue. In early June the sky never gets completely dark at this latitude. This was June 6, 2016. This is a stack of 4 x 40 second exposures for the ground (mean combined to smooth noise) plus a single 40-second untracked exposure for the sky, all at f/2.8 with the Rokinon 14mm lens and Canon 6D at ISO 4000.
