I received my new Antlia LRGB Pro and 3nm NB 50mm unmounted a few weeks ago but due to weather haven't been able to do a lot of testing with them.
In months of reading about Antlia as well as talking to them directly, I've concluded that with bright stars, no filter brands are immune to them. From samples other people have shared with their Chromas and Astrodons, they seem to be susceptible to halos too on bright stars. However now I'm going to a different approach of trying different star magnitudes to see until which point halos become apparent.
Early tests of Sirius and Antares undoubtedly showed halos, and my ASI6200MM's microlens reflections quite strongly. I've seen that from other filter brands too. So instead I'm testing dimmer stars beginning with Mu1 Scorpii. As below, Ha, Sii, and Red filters do seem to show nice control with the Oiii having a little bit of a halo still.
ASI6200MM/-10C/Gain0/Offset50/Bin1x1/5 min for NB and 3min for R on a Takahashi µ250CRS (2500mm/F10)
Unfortunately I don't have Astrodons or Chromas to compare against but here's my ZWO 2" 7nm NB filters as a comparison. The halos are visible across all 3x NB filters to varying degrees but most prominent in Oiii.
ASI6200MM/-10C/Gain0/Offset50/Bin1x1/5 min subs on a Takahashi µ250CRS (2500mm/F10)
Depending on weather, I'd like to start trying magnitude 4/5/6 stars with the Antlia too.
Edited by AnakChan, 10 May 2021 - 02:42 AM.