2nd contact diamond ring from the Arctic eclipse

Location of photo
Longyearbyen, Svalbard Norway. 78 degrees Latitude
Date/Time of photo
March 20 11am
Canon 70d with Canon 400mm f2.8 on an Astrotrac mount
Having trouble reaching infinity focus, possibly due to the zero degree F temps. I stopped down to f11 to get focus and netted some nice diffraction on the diamond.
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