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Helix Ha OIII
SPX350, F4.53, EQ6, ATK-16HR, Astrodon Ha5nm OIII 3nm filters.
Ha-red 3hrs
OIII-blue 3hrs 40min
Ha20%OIII80%-green. 10min subs. Synthetic RGB.
First one is Ha Luminance.
Second one is OIII luminance.
Managed to get some OIII rays in the Helix like Strongmanmike and lots of Ha detail around the hole. This nebula was actually quite bright but needs a wider field to get the various shells of this huge nebula. Had some guiding trouble with the OIII which needs sorting but Ha was fine.
Thanks for looking, John.
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