The constellation of Canis Major, including the bright star Sirius, and below it, the open cluster M41. At bottom is the loose cluster/asterism CR 140. This is a stack of 6 x 4 minute exposures at f/2.8 with the Sigma 50mm lens and Canon 60Da at ISO 800. I shot this from Coonabarabran, Australia with the constellation straight overhead. I used the iOptron Sky Tracker. High cloud added the natural glows around stars - no filter was employed here.
The constellation of Canis Major, with Sirius at upper right, and Messier 41 cluster to the left of Sirius, and M46 and M47 clusters above at upper right. This is a stack of 4 x 4 minute exposures at f/4 with 50mm Sigma lens and Canon 5D MkII at ISO 800. Plus two layers taken thru Kenko Softon filter, same exposure info.
The constellations of Canis Major, at left, with the bright star Sirius, and Lepus the hare to the right, with the star cluster M41 below Sirius. This is a stack of 5 x 2-minute exposures with the 50mm Sigma lens at f/2.5 and Canon 5D MkII at ISO 1600, plus an additional exposure through the Kenko Softon filter layered in to add the star glows. Taken from Quailway Cottage in Arizona, with the Star Adventurer Mini tracker.
