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M13 at 800 mm f/7, Andreas Zeinert

M13 at 800 mm f/7

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M13 at 800 mm f/7, Andreas Zeinert

M13 at 800 mm f/7

Equipment

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Acquisition details

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Description

Globular clusters are the ultimate test in my view. Telescope limits, processing skills (oups ). I had 99 minutes to offer for M13. I felt that 100 min would be overkill .
Strange diffraction patterns I never saw before on 4.5 refractor. I realized at the end of the night that a small slug was on the border of my lens with some nice slime tracks on the lens . Could this explain the pattern on the bright stars?

Comments

Revisions

  • M13 at 800 mm f/7, Andreas Zeinert
    Original
  • M13 at 800 mm f/7, Andreas Zeinert
    B
  • Final
    M13 at 800 mm f/7, Andreas Zeinert
    D

Histogram

M13 at 800 mm f/7, Andreas Zeinert