Timelapse of the gorgeous total solar eclipse of August 21, 2017, as photographed through a telescope from Lake Cascade, Idaho. The longest exposure shows the outer corona, the star Regulus (lower left), and features on the dark side of the Moon illuminated by earthshine.
Equipment: TeleVue 85 apochromatic refractor with focal reducer / field flattener, 480mm FL at f/5.6. Meade equatorial mount with clock drive. Canon 60Da at ISO 100. Partial phases: 1/1000 sec with Thousand Oaks solar filter. Totality: 1/6400 sec to 1.3 sec.