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.
Why it's not one straight photo and i see all the corners...???
Because your subs were not aligned when you were taking the photo's, they all shifted so when APP matches them with each other, they need to be rotated. You can crop the result using the "Batch Modify" button in the Tools tab, draw a box of the part you want to crop out, click "Crop ok" and gone are the corners.
@vincent-mod
Thank you for your reply.....is the meridian flip the problem ? Because my camera was not shifted in any way....
No, APP will match the subs even when they are upside down, a flip isn't the issue perse (if they are all rotated). Slight shifts are, which could happen after a flip, but whatever the cause they must have happened here otherwise it wouldn't match. Or rotation, which is what it looks like.
edit: Are all subs showing rotation or are the rotations grouped? If grouped, that could be the flip.
@vincent-mod
Thank you for your reply.....is the meridian flip the problem ? Because my camera was not shifted in any way....
Hi NicolasP,
This is a case of field rotation. Do you use an AZ mount or a dobsonian?
Also this occurs when you're mount isn't properly aligned with the celestial pole.
Clear skies Jan-Willem
I am using a HEQ5 PRO I thought that I was well polar aligned since I didn't see any drift....
Made a polar alignment with the qhy polemaster
No, APP will match the subs even when they are upside down, a flip isn't the issue perse (if they are all rotated). Slight shifts are, which could happen after a flip, but whatever the cause they must have happened here otherwise it wouldn't match. Or rotation, which is what it looks like.
edit: Are all subs showing rotation or are the rotations grouped? If grouped, that could be the flip.
I will have to check my frames again to see .......
Yeap !!!! there was a rotation in some frames .... it seems like my camera setup was unscrewed somehow maybe from a cable.....so i lost about 10 frames.....
Ah, yes unscrewing of parts can be a thing as well, glad you found out!
