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Old 25-08-2007, 12:38 PM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,704
Here is a rather poor single, multi-exposure 35mm frame that I took of the total lunar eclipse of 16th July 2000. It was my very first, total lunar eclipse. Technical details are as follows:
  • Pentax KM 35mm film camera
  • 400mm f5.6 Sigma telephoto lens set to f11 for partial phases and f8 for totality.
  • Camera and lens mounted on Vixen GP GEM tracking at sidereal rate
  • Film was Kodak Gold 100ASA colour print film.
  • Full penumbra phase (1st and last images) 1/60 second at f11
  • Penumbra/Umbra phase (2nd and 6th images) 1/30 second at f11
  • Crescent phase (3rd and 5th images) ¼ second at f11
  • Mid-totality 3 minutes at f8
You can see the changing position of the Moon on the single negative, as the GP mount was tracking at the sidereal rate (as evidenced by pinpoint stars on the original negative). This is because the Moon actually moves from West to East against the backdrop of stars at a rate of about 13 degrees in 24 hours.

Next time, at totality, I’ll try to avoid kicking the tripod, á la H0ughy….

Cheers

Dennis

PS – some of the stars could be dust specks from the scanning process…
Attached Thumbnails
Click for full-size image (Scanned Eclipse Crop Proc.jpg)
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