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Hi
The OIII and SII signal is very weak compared to the Ha in this object so long exposure time is needed, saying that though I posted an image of the same object with the same palette with much less SII and OIII exposure time than Ha, my ratio was 4:8.5:5 for SII:Ha:OIII and this was with a FSQ which is just over 4"
A nice image all the same Martin, a different colour blend to the one used, just one comment which is a personal thing, in the larger version from the link it looks a bit too smooth for my eyes
Best wishes
Gordon
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