Neil I used a Lunt 100 Single Stack with a 3x Barlow and a Gstarex camera for the close ups.The disc ones were without the Barlow .The purple CaK shot was with a Lunt B1200CaK diagonal on a 100mmED refractor.Generally I capture 400frames and stack 20-50 in Registax5 and sharpen them in CS2.Hope this helps.
Dave hope you get back into Solar imaging soon.
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