2026-10-09 APP 2.0.0-beta48 has been released !
This is mainly a bug fix release for the reported bugs in beta47. In addition it has a significant User Interface performance improvement noticable when you need to process 1000s of images in APP.
2026-10-03 APP 2.0.0-beta47 has been released !
This is a very big release... many code optimizations/rewrites, many parts of APP are much faster and more precise, especially star analysis and registration are much faster ! Big mosaics will go much faster 🙂
And we introduce a new preview filter, which includes the new Adaptive Deep Sky Stretch and a General Levels Stretch, this has been long over due. The old preview filter (the panel on the right side to stretch and preview your data) has not been updated for a couple of years and it is a critical part of any APP session.
Adaptive Deep Sky Stretch or ADSS is a much more intuitive stretch algorithm. It is also color preserving (which is a great new addition in itself ! ) which means that the highlights are no longer bleached, color is maintained from the linear data while stretching. You can simply stretch your data using the sky background level and signal width sliders which work much easier and more intuitive. You no longer need to fiddle with the old complicated sliders with zoom buttons. All the zoom buttons for the sliders are made redundant. And you can enter slider values in the slider value fields yourself. I will make a youtube video in the coming days to explain and fully introduce ADSS. Once the video is ready, it will be highlighted on the forum.
RGB Combine upgrade !. The RGB Combine Tool has been rewritten mostly. The tool is faster and easier to use and most importantly, the Luminance slider to inject a luminance channel or channels into the RGB composite is now working correctly. It no longer bleaches the RGB colors. Combined with the new ADSS preview, you will get much better and easier great composites with great color! I will also explain this in a new youtube video.
RedCat 51/ASI294MC Pro. After integration, seeing doughnut holes in medium-size/brightness stars:
I thought they are slightly defocused or there's a sensor tilt issue, but I don't see it in individual raw fits files:
Version 1.083.
Anything I can do with settings to prevent it?
@mseningmail-com In processing or post-processing there isn't anything you can do about this. How do you focus the RedCat? Do you use the Bahtinov-mask that comes with it?
@wvreeven no, I’m using ASIAIR and ZWO EAF. The seeing may have been less than ideal at the beginning of the session, but it automatically refocused when ambient temperature dropped 5 degrees. The process had worked for me very well in the past. Do you still think it’s a focus issue as opposed to APP clipping the stars somehow in calibration process? It didn’t clip larger stars…
Star reduction seems to have helped getting rid of doughnut shaped stars…
That may help yes, but the underlying issue is still present then. Good to see though that it does make it less obvious!
