Blue Fringe Umbra | Glendon Howell

Glendon Howell
Location of photo
Gates County, NC
Date/Time of photo
2008-FEB20 9:46 PM EST
Prime focus through Meade 8-inch f/6 Newtonian OTA on Losmandy G-11 mount. Camera was Canon Digital Rebel XTi. Camera was set to Program AE mode, -2 stops underexposure. Actual exposure was 2.5 seconds at ISO 100.
Taken just prior to beginning of totality, the photo shows a blue fringe at the rim of the umbral shadow, indicicative of Danjon L = 4.0
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