MAY 4 2026: APP 2.0.0-beta44 has been released !
New improved internal memory controls should now work on all computers
May 1 2026: APP 2.0.0-beta43 has been released !
Improved internal memory controls (much more stable and faster on big datasets), fixed CPU image viewer, fixed Narrowband extraction demosaic algortihms.
Apr 29 2026 APP 2.0.0-beta42 has been released !
New improved Normalization engine, Fixed random crashes in integration, fixed RGB Combine & Calibrate Star Colors, fixed Narrowband extraction algorithms, new development platform with performance gains, bug fixes in the tools, etc...
Apr 14 2026: Google Pay, Apple Pay & WeChat Pay added as payment options
Update on the 2.0.0 release & the full manual
We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version.
Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.
Hello everyone,
I’m new to APP and just started doing Narrowband pictures. And, of course, I’m starting with a mosaic. Never did that before as well. I wanted to preview the first 3 panels I finished and ask myself, how do I separate the narrowband since I took them with a duoband filter with an OSC. I’m getting a little confused with all the file management in APP though it seems to be great. What I did so far: didn’t separate the narrowband, just for testing. Put the lights in 3 sessions, for each panel I did that night. The result was ok, it stitched a great picture together. But now I want to process the Ha and OIII separately.
If there’s a tutorial out there already I may have missed it. Maybe someone can point me into the right direction.
CS, Sven
Hi Sven @easylink,
Thank you very much for posting your question and welcome to the APP forum !
Regarding the Ha and OIII extraction of your douband filter data:
1) load your images including all your calibration frames
2) go to 0) RAW/FITS and change the Bayer & Trans CFA algorithm to one of the Ha O3 algorithms.
Ha-O3 color will make a color image a bit better than using the default Adaptive Airy Disc algo. Adaptive Airy Disc is the best algo for regular OSC data. For your data with a duo narrowband filter, use the Ha-O3 color algo for the best color result of both Ha & O3 together.
Ha-O3 mono will create a monochrome black& white result of both the Ha & O3 data
Ha-O3 extract Ha will extract only the Ha data to a monochrome results, and use extract O3 to get the O3 data.
3) To get both the Ha and O3 extracted data, set it to extract Ha and make your integration.
4) then go to 0) Raw/Fits and change the algorithm to extract O3. APP will inform you that the data needs to be renormalized.
5) Simply go to 6) integrate again and push integrate. APP will normalize the O3 data and make your O3 result.
Let me know if this helps 😉
For your information and any others doing DUO/TRIPLE/QUAD Narrowband processing, the next APP release 2.0.0-beta39 will have many improvements for processing the data. We are adding new algorithms for SII-H-beta as well.
Mabula
Thank you Mabula, for your explanations. So I start with the project from the start like I did before, just with a different algorithm?
Hi Sven @easylink,
Indeed, start at the beginning with loading your lights and calibration frames and before starting any processing, set the desired demosaic algorithm in 0) RAW/FITS first. Once you have set the algorithm, you can already check what happens with your image data when you double click a light frame in the frame list panel. If you set it to HaO3 color, then APP will show you a color image. If you set it to HaO3 extract Ha, you will see the black and white H-alpha data when you double click on a light in the frame list.
Let me know if all is clear now 😉
Mabula
