Ursa Major is not my usual target but deserves a place in sky images if for no other reason that it is a year round constellation for those of us who live in the northern part of the globe. Those with sharp eyes may be able to spot M51, 81 and 82 by zooming in as the image has high resolution.
Details
Modified Canon 6D camera with 24mm f/1.4 Sigma A series lens operating at f/2.8
Exposures - 7-240s frames taken with long exposure noise cancellation, including 3 with a Cokin difusion filter.
Processing in ACR and Photoshop.