Ursa Major found a hole in the clouds shortly after nightfall at the 2012 Island Star Party. To my surprise, the 15mm focal length lens did a good job of resloving Mizar and Alcor, second from the end of the dipper handle
Details
2012-07-20 at 11:03 PM PDT
Equipment - tripod mounted Canon T3i with 15mm Sigma lens.
Exposure 1-15s raw frame at ISO 1600 and f/2.8
Processing in Photoshop.