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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Only darks and bias
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darks bias flats
My guess would be that, since it only happens when using the hyperstar, something is not going right while taking the flats. There must be some difference between the time you take the lights and the flats, apparently the vignetting is stronger when taking a flat frame. Very tricky to pinpoint what it is exactly without hardware access.
I've taken my flats the same way since I got the HS and it has only become an issue recently. I can't imaging why it's all of a sudden not workingÂ
Strange, no difference at all in the way you take the flats either? Did you use different bias frames or a different APP version (not that that would be the cause, bu just probing where there are differences 🙂 ).
Try doing your flats by imaging clear sky - before your imaging session. I'm not sure about hyper star but I saw once that putting a t-shirt at the end of the dew shield yielded bad results. I put the t-shirt right at the front of the telescope but the last time I did my flats I used the clear sky approach . Also, image train changes may result in bad images because of thinks like stray light. Did you change any image train components?
