As I’m soon venturing into the new world of Mono imaging and this has prompted me to ask a question about the various degree and types of emission lines in each popular Emission Nebula and Planetary Nebula.
For a OSC user it’s not as important due to using multiband filters but for a Mono imager it makes sense to get an understanding of the types and strengths of emission lines in an object.
For example, there’s no point spending hours imaging with your Sii filter if that object has little or no Sii emission. The time spent could have been used more wisely to capture more relevant emission lines.
I found this website which covers a few objects but I’m wondering if any Mono imagers evaluate an object and the filters required before imaging ? Or just shoot all 3 ( Ha , Oiii and Sii ) and process accordingly.
Seems to me waisted time , and clear sky is precious, unless your in a desert.
I realise that Ha is the dominant emission line but it would be an advantage to know the strengths of Oiii and Sii ( even Hb ).
https://www.galactic-hunter.com/post...r-expectations
Is there a chart or list out there somewhere similar to the link for emission objects in our southern skies
Most data on emission nebula ( eg: Stellarium) just say H11 region in the specs
Comments , experience and advice welcome