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.
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Hello,
New user here
and was hoping I could get a bit of help with a problem. Â I've taken mono L, Ha, R,G,B images with the 1600mm Pro and have used APP to calibrate each channel. Â The calibrated LRGB lights look good, but the calibrated Ha lights seem to bright in the middle - They don't look correct. Â My details are as follows:
L - Using 50 Gain, 10 offset and Exposure of 45sec. Darks at 240 sec. @ 50 Gain. Flats & DarkFlats of 50 Gain @ same exposure times using NINA's FlatsWizard.
RGB - Using 50 Gain, 10 offset, and exposure of 60 sec. Darks at 60 sec. @ 50 Gain. Flats & DarkFlats of 50 Gain @ same exposure times using NINA's FlatsWizard.
Ha - Using 139 Gain, 10 offset, and exposure of 240 sec. Darks at 240 sec. @ 139 Gain. Flats & DarkFlats of 139 Gain @ same exposure times using NINA's FlatsWizard.
I was thinking it was related to the flats or dark flats, but when I calibrate the Ha frames using only lights and darks I still get the same issue of a brighter area in the center of the calibrated lights.
Attached are images of the lights (linear) and Lights (Calibrated). Â You can see the brightening of the image center in the calibrated frame. Also included images of my D, DF, F, MDF, and MF for reference. Â
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Not sure what I'm doing wrong, I'm very new to this. Â Going a bit crazy here : )
Thanks,
JoeÂ
Looks to me as if you have variations in your flats regarding what you're seeing, is that correct? You'd want a flat to be very similar, the same, across the panels as they need to capture the true vignetting profile and any possible dust. Now when not using them and still getting this brighter spot, could you also take out the darks and any other calibration data to test that as well?
@vincent-mod Without the Flats and Darks I don't see the bright spot in the lights alone. Â Do you think the problem is in the original flats? Â I could take a new set of flats and check. Â
Well you mentioned it was still there with the darks added, so removing those has solved the issue? That could point to an issue with the darks in this case.
