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.
I have two different focal length subs and would like to combine them and make RGBHOO.Â
1. Ha and OIII using mono camera at 1000mm focal length.
2. OSC with L-Ultimate at 460mm focal length
3. OSC with L-Ultimate at 360mm focal length
What is the best way to combine these?Â
I have tried putting them all together with their respective calibration frames in APP and it works to some extent using RGBHOO but I'm not able to use Ha and OIII from L Ultimate.Â
Â
Any suggestions are greatly appreciated.
Â
Â
 after stacking them all together. I would like to add Ha and O from L ultimate into this.
Split your OSC files into RGB (still should do this even using l-enhance, just green will be more dim), then stack those results into master R, G, and B files. Stack your Ha and Oiii into master lights as well. Once you finish that take your master R, G, B, Ha, and Oiii files and put them back in as lights again, then run them with advanced on the Normalization tab, and I'd run 4th degree and 5 iterations on local normalization correction on the integrate tab, but leave MBB unchecked. Make sure to uncheck same camera and optics on the registration tab. You probably will not need to do it as a mosaic, but if you still have any problems you may give that a shot.
