The Owl Nebula, Messier 97, a planetary nebula in our galaxy, and the edge-on spiral galaxy Messier 108, paired in the same area of sky below the Bowl of the Big Dipper in Ursa Major. This is a stack of 5 x 4-minute exposures at ISO 1600 with the Nikon Z6 mirrorless camera taken as part of testing, on January 14/15, 2019. This was through the Astro-Physics Traveler refractor at f/6 with the Hotech field flattener. No LENR or dark frames applied but it was about -10° C. Flat fielding supplied by lens correction in Camera Raw and by Gradient Xterminator filter in Photoshop.
Stack of four 10-minute exposures with Canon 20Da at ISO400 and with 5-inch AP scope at f/4.5. Taken April 25.
The galaxy trio M98 (at right near the star 6 Comae), M99, the Coma Pinwheel (at bottom), and M100 (at upper left), captured in a deep blue twilight sky on June 4, 2019. The pair of NGC 4602 and NGC 4298 are left of M99 at bottom left. Images taken later under darker skies were plagued by haze moving in. Despite the bright sky galaxies as faint as magnitude 14.5 are recorded. This is a stack of 6 x 2-minute exposures at ISO 1600 with the Canon 6D MkII and Astro-Physics Traveler 105mm apo refractor at f/5.8 with the Hotech field flattener. Shot for a book illustration.
