A telephoto lens shot of the M50 to M46/M47 area of Canis Major-Monoceros border, simulating the field of binoculars. M50 is at upper ight, M46 & M47 at left edge. Red nebula is IC 2177 Seagull Nebula. Taken from Coonabrarbran, Australia, Dec 15, 2012. Some incoming cloud added glow from off-frame Sirius in corner of frame. This is a stack of 2 x 5 minute exposures at f/2.8 with the 135mm lens and Canon 5D MkII at ISO 800. Field also contains clusters NGC 2360 and NGC 2353, and nebula NGC 2359 Thor's Helmet.
A collection of bright star clusters and colourful nebulas on the border of Cassiopeia and Cepheus. The prominent star cluster at left is Messier 52. The emission nebula to the lower right of it is NGC 7635, aka the Bubble Nebula; above and to the right of it is the small but intense nebula NGC 7538. At upper right of the frame is Sharpless 2-155, aka the Cave Nebula. The diffuse nebula at bottom is Sharpless 2-157, aka the Lobster Claw Nebula, with the small star cluster NGC 7510 near the end of one of its claws. The small star cluster at lower right made yellow by interstellar dust absorption is NGC 7419. This is a stack of 8 x 8-minute exposures through the Borg 77mm f/4 astrograph and with the Canon EOS Ra red-sensitive mirrorless camera, at ISO 800. Stacked, aligned and processed in Adobe Camera Raw and Photoshop 2020. No nebula or light pollution reduction filter was employed in taking the images. I shot this from home November 25, 2019 on a very fine if frosty autumn night. No special star masks were employed in processing to enhance star colours or process them separately.
A telephoto lens image of the galaxy pair Messier 81 and 82 (top) in Ursa Major. This is shot to simulate the field of view of binoculars for illustration purposes. NGC 3077 is below and the left of the pair, while at far left is Coddingon’s Nebula, IC 2574. This is a stack of 6 x 1-minute exposures with the 200mm lens at f/2.8 and Canon 6D MkII at ISO 800, tracked but unguided on the Mach 1 mount, on April 28, 2019.
