This is an inverted image of Messier 36, 37 and 38 in Aruiga taken as a test of an iOptron StarTracker shows good star shapes after 90 seconds of exposure with a 300 mm lens.
2103-04-11 from my back yard in Victoria BC
Canon 6D camera with f/4 300mm Canon L series lens on iOptron SkyTracker mount.
3 - successive 30 sec exposures at ISO 800 and f/4 were combined without alignment, enhanced and inverted in photoshop.