Celestial hemisphere:  Northern  ·  Constellation: Lyra (Lyr)  ·  Contains:  IC 1296  ·  M 57  ·  NGC 6720  ·  Ring nebula in Lyra
M57 outer shell in H-alpha, Mauro Narduzzi
M57 outer shell in H-alpha
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M57 outer shell in H-alpha

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Very long exposure to reveal the outer shell in Halpha light in M57, the famous Ring Nebula in Lyra. F/8 is not a focal ratio suitable for halpha if you want rapid results, but this time I combined 18x900s frames taken during June 2013 and other 7x1800s taken June 2014. The very outer shall is barely visibile, but..there it is!

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M57 outer shell in H-alpha, Mauro Narduzzi