I have worked on double-stacking my h-alpha frankenscope. And it is getting there. I came home late after work, and decided to exploit the clear skies at sundown. I focused on a prominence and took a short timelapse of less than half an hour. It looks ok.
Tech details : Homemade 5" h-alpha, double stacked. ASI678MM camera. Gain 150, 6ms exposure. Best 25% of 1000 frames stacked by AS!4. Sharpened and stabilized in imPPG. Timelapse in PIPP.
