A star trail scene in the summer twilight, taken June 7, 2015 from southern Alberta, over an old farm house near home. The brightest trail at right is from Venus, to the left of it is Jupiter. Various satellites, including the International Space Station, provide the other dashed streaks. The twilight of near summer solstice provides the deep blue sky. This is a stack of 300 frames taken for a time-lapse sequence but stacked here into a single image using the Advanced Stacker Actions Photoshop plug-ins. The ground is from one frame from the beginning of the sequence when the sky and ground were brighter. Most frames were 6 seconds at f/2.8 and ISO 800 with the Nikon D750 and Sigma 24mm lens.
A pass of the International Space Station in the brightening twilight of dawn, on the morning of June 1, 2015, with the gibbous Moon setting to the southwest at right. The view is looking south, with the ISS travelling from right (west) to left (southeast) over several minutes. This was the last pass of a 4-pass night, May 31/June 1, starting at 3:55 am MDT this morning. This is a composite stack of 144 exposures, each 2 seconds at f/2.8 with the 15mm full-frame fish-eye and ISO 3200 with the Canon 6D. The gaps are from the 1-second interval between exposures. The length of the trails and gaps reflects the changing apparent speed of the ISS as it approaches, passes closest, then flies away. I stacked the exposures with the Advanced Stacker Actions from StarCIrcleAcademy.com, using the Lighten mode. The ground comes from a Mean blend of just 8 of the exposures to prevent shadows from blurring but to smooth noise.
Circumpolar star trails at dawn over the historic Butala homestead at the Old Man on His Back Prairie and Heritage Conservation Area in southwest Saskatchewan, taken May 2015. This is a stack of 70 frames from a larger time-lapse sequence, from the end of the sequence in the dawn twilight. Each exposure is 40 seconds with the 14mm lens at f/2.8 and Canon 60Da at ISO 1600. Stacked with Advanced Stacker Actions. The foreground comes from a stack of 8 of the final exposures, mean combined, to smooth noise.
