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Astrophotography of Planetary Nebulae

M57, Ring Nebula, NGC6720

M57, Ring Nebula, NGC6720

Date: May 29, 2006

Telescope: Celestron 11 XLT, f/5, CG5 mount

Camera: Starlight Xpress SXV-H9C

Exposure: 21 15-sec subframes (5.25 min total) unguided

Comments: Optec .33 focal reducer spaced to give f/5

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