Its a collimation aid called sky calcyrille.de.brebisson wrote: Sat Sep 12, 2026 10:21 pm Hello,
"I use a tribahtinov mask and skycalc download"
What is skycalc? Never heard about it....
"It works on my system"
So what did you do exactly? You took a smaller ROI and did you change any of the other parameters?
Thanks,
Cyrille
Works with a tribahtinov mask and is very effective for all sct scopes