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.
I'm getting red halos around all stars when integrating with APP with Radian quad band filter lights.
With the same config in APP, when I integrate my lights from other filters (Optolong L-Pro is on the right) I don't get the halos (attached left is Radian quad and right is Optolong L-Pro). Also, all subs using the Radian quad filter have pure white stars, no halos:
Is there any easy fix to this? I'm hoping there is some setting I'm using in APP that is causing this - is there an easy way I can share all the APP settings in a forum post?
I'm too novice to know all the differences in the options I'm selecting in the tool though, I select the bayer in tab 0 and I use the bayer dithering, other than that for the most part using default settings (a few others I've changed like rejection, normalization etc but I don't believe those could be creating this?)
The camera is the ASI2600 MC pro (color) and lights are 5min.
Is it as simple as altering the multipliers? Given the real differences in the halos (vast variation) it seems just a broad multiplier will give very mixed results:
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Thx for suggestions
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Anyone have insight on why the red halos are happening only with the Radian Triad Ultra Quad-Band Narrowband Filter?
I can work them out somewhat with a lot of patience - but I'd love to understand what is causing this and to eliminate -
They are not visible in subs (Radian ultra subs)
They do not occur with same APP stack settings when I use other filters like Optoplong L-Pro.
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Thanks for suggestions!
Hi, first, leave everything on default in tab 0.
No need to change (AAP will recognise 2600 fits).
Although QUAD band, this looks similar to Dual band, mostly prominent Ha (red) / Oiii (green/blue) colors, especially for stars.
L-Pro is wide band RGB, hence you will see regular star color (red-orange to white, to blue), as opposed to any multi-narrow filter (the quad, l-enhance, l-extreme, etc).
See image here, from a photo i finished with l-extreme (dual band Oiii+Ha)
This is of course after process, reduction, neutralization, wb adjust, etc.
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And this is another old shot (with the l-pro) natural colors for stars:
