Circumpolar star trails and aurora over the Red Deer River, Alberta from the Orkney Viewpoint north of Drumheller on May 5, 2018. This is a stack of 650 images for the sky and river reflections using Advanced Stacker Plus actions in Ultrastreak mode. The ground comes from a stack of the final 8 images in the set, averaged to smooth noise. All exposures were 10 seconds at f/2 with the 14mm Sigma Art lens and Nikon D750 at ISO 3200. The frames were taken for a time-lapse movie of the aurora, which proved fairly quiet this night, so in stacking the sky, the aurora did not blur too much. Most of the curtain activity seen here was in the last dozen or so frames.
Jupiter in Libra is rising over the moonlit Badlands on Highway 10 east of Drumheller, Alberta. Light from the waxing gibbous Moon off frame to the upper right provides the illumination on April 26, 2018. This is a stack of 5 x 25-second exposures for the ground to smooth noise, and one 25-second exposure for the sky, all at f/5.6 for depth of field, with the Rokinon 14mm SP lens and Sony a7III camera at ISO 800. Nik Sharpener applied to the ground.
A scene of Earth and sky, with Big Dipper over the late Cretaceous sedimentary layers of the Red Deer River Badlands. The Big Dipper is at top pointing down to Polaris and the Little Dipper, over the moonlit Badlands on Highway 10 east of Drumheller, Alberta. Light from the waxing gibbous Moon provides the illumination on April 26, 2018. This is a stack of 5 x 15-second exposures for the ground to smooth noise, and one 15-second exposure for the sky, all at f/4 with the Rokinon 14mm SP lens and Sony a7III camera at ISO 800. Nik Sharpener applied to the ground. The Dipper is distorted slightly by the pincushion distortion of the 14mm lens. The Moon off frame to the right adds the gradient to the sky.
