Release-Note for uploaded image
16:9
Progress of total solar eclipse & shadow cone

HD compatible (1365×768).....176KB (file name: wp71x.jpg)
Full-HD compatible (1920×1080).....327KB (file name: wp71f.jpg)

Released date: Oct 9, 2017


Brief Description   Upper half of this image has paralleled the change of sun from left to right with interval of 3 minutes on the basis of diurnal motion for 25 minutes across the maximum totality observed on Aug 21, 2017 at Oregon, USA.
  And lower part indicates the whole-sky image during the totality with Cartesian-converted span of 0° to 80° in vertical and about 300° in horizontal around south direction.
  The eclipsed sun can be seen in southeast sky and the Venus is at upper right hand side of the sun seen as a light spot. You can recognize a vast reversed triangle shadow stretched under the sun. It's the lunar shadow cone fallen on ground. During the totality, I could observe that the lower surrounding skies were bright like colors of the sunset.

Photography Condition
Date & Time...Progress: Aug 21 2017, from 10:06:40 to 10:31:00 PDT(-0700), 8shots with 1/4000sec. exposed (ISO400, partial eclipse),
    Composed 2 shots of 1/125sec. exposed (ISO800, total eclipse)
   Shadow cone: Aug 21 2017, 10:19:16, 1/2sec. exposed, converted to cartesian coordinates
Optical... Progress: BORG 60ED with a correction lens (f=378mm, F6.3)
   Auto-guided with EYEBELL CD-1 portable Equatorial
   Shadow cone: SIGMA 4.5mm EX Circular DC (stop: F2.8), Fixed on tripod
Digital Camera... Progress: Nikon D810A (Recorded in 14bit CCD-RAW)
   Shadow cone: Nikon D50 (Remodeled, ISO200, recorded in 12bit CCD-RAW)
Location... Salem, Oregon, USA




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