The Big Dipper and all of Ursa Major in the deep twilight of an August evening, at Eastend, Saskatchewan, with an old farmstead building in the foreground. Shot August 28, 2019. This is a blend of a single long 5-minute exposure at ISO 400 for the dark ground, and a single short 30-second exposure at ISO 1600 for the bright sky. Both with the 24mm Sigma Art lens and Nikon D750. LENR not applied (by mistake — I forgot!) to the long ground exposure, so I had to employ a Dust and Scratches filter in post to eliminate all the hot pixels on this warm night. Serves as a good demo of why you should use LENR. A mild Orton glow added to the sky, and a mild application of a “Dramatic Landscape” filter added to the ground, both with Luminar Flex.
A panorama of the arc of Northern Lights seen August 26, 2019 about 11:30 p.m. CST from Grasslands National Park, Saskatchewan, from the Two Trees Road. This is looking northeast. The Big Dipper is at far left. Capella is the bright star above the arc, while Perseus is at upper right. The Pleiades are rising at right, above the silhouette of 70 Mile Butte. This was a diffuse grey arc to the eye but the camera picks up the green and red colours from the oxygen emission lines. This is a 5-segment panorama with the 24mm Sigma Art lens at f/2 and Nikon D750 at ISO 3200 for 20 seconds each. Stitched with Photoshop.
A 220° panorama of the northern autumn constellations rising in the east at right, and the northern stars, including the Big Dipper at far left. From left to right, we see Ursa Major, Ursa Minor, Perseus, Cassiopiea, Cepheus, Andromeda, Pegasus, and Aquarius rising above Eagle Butte at Grasslands National Park. The Andromeda Galaxy, M31, is at centre. This was August 26, 2019. Lights from towns to the north of this Dark Sky Preserve light the northern horizon. However, green natural airglow does discolour the sky. The constellation patterns are a little distorted by the panorama projection geometry. This is a stitch of 13 segments, each with the 24mm Sigma lens at f/2 and Nikon D750 at ISO 6400, in portrait orientation, for 30 seconds each, and at 15° spacings. Stitched with ACR.
