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.
hey 😉
i am working on a widefield Polaris shot right now. I want to image the region the whole week.Â
i am using a lens with an aperture of f1.4 and I am background limited after around 1 minute of exposure. this leads to an huge amount of lights to stack, probably at least around 800 light frames.Â
i don't have enough memory to stack that amount of lights at once. what is the best way to manage that amount of pictures? stack every single night and than stack the nights at the end?Â
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thx
Andi
@yellowhorsehead Hi Andi. Do you reuse the calibration data (most notably the flats) for all nights? If yes, you can split up all data in batches of, say, 100 and then in the end load all integration results as lights (don't load any calibration data) and integrate those.Â
If you have flats for each night you can process per night. If there are too many subs in a single night then you can split that up as described above. In the end you can again load all integration results as lights (again without calibration data) and stack those.Â
@wvreeven Just adding to this thread, so I process my nightly subs with their calibration frames and get the output fit file.
So I then load these all as lights and just integrate them. Do I need to change any setting from the default? (I'm shooting M51 with about 40 subs per night with exposures of 15s,50s 90s etc (Newbie and just sorting mount, tracking and guiding, so getting better.......)Â
@hookandy There shouldn't be a need to change the defaults, unless you get a mono integration result where you expect a color one. In that case you need to tweak the settings in tab 0.
