16 November 2020 - Wouter van Reeven has officially joined the Astro Pixel Processor Team as a moderator on our forum, welcome Wouter 🙂 !
30 July 2020 - APP 1.083-beta1 has been released introducing Comet processing! This 1st beta has comet registration. The stable release will also include special comet integration modes.
9 July 2020 - New and updated video tutorial using APP 1.081: Complete LRGB Tutorial of NGC292, The Small Magellanic Cloud by Christian Sasse (iTelescope.net) and Mabula Haverkamp
2019 September: Astro Pixel Processor and iTelescope.net celebrate a new Partnership!
LP Filter and Star Colour calibration?
I'm still trying to get a handle on interpreting the Star colour graphs and getting good accurate star colour. Trying to figure out how much my light pollution filter is shifting colour?
I've attached a screen grab from a recent calibration and trying to understand if I need to do anything additional to the settings, slope/etc?
Have I got accurate star colour? Thanks for any help.
Based on that algorithm that seems to be a good calibration yes. The data points are brought closer to the optimal diagonal line which is the expected trend. You can tell that the stars are nicely blue-ish and orange as expected and the H-alpha signal is correct as well. You can play around a bit with that reddish color and make it slightly more pink (which technically is more correct or redder as that's usually perceived as being nicer). In the end there is only the technical correct color belonging to the actual spectrum of the gas and stars, but there's no real "best" color as most is personal preference.
Great, thanks for the feedback.
So in a nutshell if I understand the graph methodology, I want the majority of stars to be along the diagonal, and around 90% or so to be positive, with the remainder negative (blue stars)?