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.
Hello everyone,
I'm experiencing an annoying issue when performing the calibration of a set of exposures.
I'm using an ASI294 camera and what happens is that the dark calibration doesn't seem to operate properly and the flat calibration reports the attached critical message.
The problem is that what appears in the message doesn't corresponds to reality.
The lights and the darks have the same exposure and parameters (300s, gain 121, offset 8) and the same happens for flats and dark flats (0.422s, gain 121, offset 8). So I really don't understand why the system is not calibrating correctly.
Thank you for any suggestion or guidance you may provide on the topic
Piergiorgio
@plicciar Hello Piergiorgio,
to your luck I had the same issue a few months ago, but in the older versions. Look if your darks are properly and the flats seems to be to short exposed. The Asi 294 mc pro needs flats also darkflats at 3-5 sec. exposure and and average adu of 24000-25000k. As my darks where faulty, I had the same calibration warning and as I do new darks it works fine then.
Can you show your darks and flats in asiviewer, if you shoot with the asiair. And also show the histogram of the flats etc.!
The next thing I know is, that the 294 works fine with a offset of 30.
Best regards and clear skies!
I show you my issues with my older and faulty darks. And with this I had become the same warning.
And here the same data with the new darks and the same flats as before.
@tobiasthale thank you for your response.
I know that, in order to get a better result, the IMX294 would require longer exposures. And about the offset I have found different positions (for instance I use offset 30 with the IMX533).
But this should affect the final result and not the integration process.
I mean, why the system is asking for files with the corresponding exposures and gains when they are there?
It seems like the system is not able to correctly match the darks with the corresponding lights and the flats with the corresponding dark flats, even if the capture parameters are correct.
Seems like the system is searching for something else...
Back to your suggestion, unfortunately, re-capture flats and dark flats is not possible as flats are useless if they are not taken under the very same conditions. And this is not applicable if you have to re-mount the setup.
Anyway thank you once more for the support
