Hallo with an ASI6200MM Pro and filters

mspinnato

Hello. I have a distribution of halos when I take a picture a bright star within. These halos appear when I use a filter with coating like Optolong or Baader (Ha, SII, OII, RVB). Do you have an idea about the root cause and what I can do to solve this big trouble..

Thank you by advance.

Michel

Tech@ZWO

mspinnato This usually due to diffraction and reflection from the bright stars. you can change the optical adapter in the imaging train to see if any difference.
And change the distance of the filter and camera may cause reduce this. or try a fast f/ratio telescope or a larger pixel camera.