For this picture, the Seestar Collective gathered about 140h of IRCUT data and 50h of narrowband data with S50 and S30 telescope using the internal LP filter and the external SV220 filter.
I kept the best 78h for IRCUT and the best 28h for LP and stacked them in Siril with drizzle 2x.
All the processing was done in PI. I extracted the Ha signal using continuum substraction and combined it with the IRCUT edit to get the final image.
I kept the framing wide so that NGC 4217 is included into the FOV.
The Seestar Collective website is available at: https://stcollective.net/
More details and full resolution image available here: https://app.astrobin.com/i/lv3q15
by jam_2016