Brand new to this forum and looking for guidance! I recently purchased an STC Optics clip-in filter hoping to cut through the light pollution in my Bortle 7 backyard but in stretching my DSS stacked image, I've come across a rainbow colour cast that I don't know how to get rid of. So far have not found a solution online. It may be that the filter wasn't placed correctly.
Setup: Fuji Xt1 w/50-140mm f2.8 at 140mm f5.6 ISO1600, STC multispectra clip-in filter, Skyguider Pro.
Imaging: 67x70s Lights (57 minutes exposure), 66 Darks, 81 Flats, 81 Dark Flats, 71 Bias.
Target: North America nebula (NGC 7000)
Edited by NorthSideBound, 17 September 2020 - 07:12 AM.