…unless using a pretty narrowband Ha filter, Ha and SII are basically the
same (656 vs 671). OIII should be the next filter to get.
http://www.narrowbandimaging.com/images/crab_composite_hd.jpg
…unless using a pretty narrowband Ha filter, Ha and SII are basically the
same (656 vs 671). OIII should be the next filter to get.
http://www.narrowbandimaging.com/images/crab_composite_hd.jpg
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Another beautiful night.