I’ll add to this blog very soon but I just had a great time viewing the Total Solar Eclipse in Idaho.
I was part of a tour organised by Omega Holidays to Idaho. I was on Coach 3 with some great people:
On the day of the eclipse we set off at 615 am to the Menan Buttes about 20 miles from our base in Idaho Falls. We arrived before 7am but the car parks were already full. We disembarked and found suitable spots on the North Butte to watch or film the eclipse whilst our coaches went to the area reserved for them.
I set up two cameras. One, the Canon 5DMk3 was set up with its 24-70mm lens (on the LHS of the photo below) to photograph the wide angle sequence above. It was set at ISO 200, f/11 and 1/60s exposures at 5 minute intervals (using an intervalometer) and had a Thousand Oaks solar filter during the partial phase. At totality the filter was removed an 7 bracketed exposures taken and one selected for totality. After totality the filter was put back and exposures taken every 5 minutes again. Frames from each 5 minute interval plus one from totality were stacked using the StarStax software.
For the closeup photographs (below) the Canon 70D was used with a Canon 100-400mm Mk II lens and 1.4x extender (560mm focal length on a 1.6x cropped frame APSC camera). A filter made of Baader Planetarium Astrosolar film was used during the partial phase that fitted a 100mm Lee Filter. During partial phase 3 bracketed shots were taken roughly every 5 minutes (1/1600, 1/800, 1/400s at ISO 200, f/8). Just before totality the filter was removed and I switched to 7 bracketed shots (1/8000s via 1 stops to 1/125s) to capture the Diamond Ring (missed at 2nd contact), Baily’s beads, and various other phenomena. During totality I also took shots from 1/60s through to 1 second. Most of these showed camera shake (probably due to wind and/or mirror shake).
Just before end of totality I set up again to capture the diamond ring (success!) and then for third contact put on the filter for the second partial phase. A selection of frames are below and at the bottom is a composite sequence from start of the partial phase through to end of the eclipse.
The following shows a composite sequence of the eclipse from partial phase just after first contact through to just before fourth contact. At totality various phenomena are visible: Baily’s Beads; Solar prominences; Corona with streamers; and the Diamond Ring. These were obtained by various exposre settings from 1/8000s through to 1/125s.
The photo below is a sequence of Baily’s Beads shots taken during a four second period between the first diamond ring and second contact.