This is a binocular field (roughly 10° wide) framing of the contrasting open clusters M46 (rich, left and M47 (loose, right) in Puppis. Cluster NGC 2423 is above M47. Cluster NGC 2360 is at right. And above it the cyan-colored nebula Thor's Helmet, NGC 2359. Small red spot at lower right is Sh2-301. This is a 2-image stack of 3-minute exposures with the 135mm lens at f/2.8 with the filter-modified Canon 5D MkII at ISO 800. This was taken in May 2011 from Atacama Lodge in Chile.
The star clusters Messier 46 (left) and Messier 47 (right) in Puppis, in a wide-field telephoto image simulating the feld of view of binoculars. The clusters NGC 2423 (above M47) and Mel71 (top) are also in the frame. The little planetary NGC 2438 embedded in M46 just shows up as a green dot. This is a stack of 12 x 2-minute tracked but unguided exposures with the Canon RF70-200mm lens at 200mm and f/4 with the stock Canon R5 at ISO 1600. Taken from home Feb 10, 2023.
Open cluster pair of M47 (right), a bright loose cluster, and M46 (left), a fainter but very rich open cluster. Loose cluster at top right is NGC 2423. Planetary nebula NGC 2438 is at north edge of M46. Taken from Timor Cottage, Coonabarabran, NSW, Australia, December 12, 2010. This is a stack of 5 x 6 minute exposures at ISO 1600 with Canon 5D MkII camera on 105mm Astro-Physics Traveler apo refractor at f/5.8 with 6x7 field flattener.
