Mar 28 2026 APP 2.0.0-beta40 will be released in 7 days.
It did take a long time to have the work finished on this and it will have a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration. We extensively optimized many critical parts of APP. All has been tested to guarantee correct optimizations. Drizzle and image resampling is much faster for instance, those modules have been completely rewritten. Much less memory usage. LNC 2.0 will be released which works much better and faster than LNC in it's current state. And more, all will be added to the release notes in the coming weeks...
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.
Hi,
I am using a OSC camera (ASI294MC Pro) with the STC Duo-Narrowband filter. My OAG prism intrudes on the light path, covering the top left corner. Normally, flats help mitigate this. When I use Ha-OIII Extract Ha, the calibrated image looks fine:
But if I change the debayer algorithm to Ha-OIII Extract OIII, the corner that is shadowed by the OAG prism brightens up (and you can see more of the ASI294MC's characteristic amp glow in the top right):
This happens whether or not I take flats with the Duo-Narrowband. Why are the calibrated OIII images not appearing to take flats into account correctly?
That's an interesting question indeed. Could you share some lights that show this issue, together with your master calibration frames?
Go to https://upload.astropixelprocessor.com and use upload1 as username and upload1 as password.
Create a directory named “geordan-flatsproblem” and upload in there. Thank you!
For me, it happens the opposite.
Flat seems to correct well on both ha-o3 color and extract o3, but not on extract ha: it corrects well on 3 corners of the frame, except the one in the upper left where an evidence of some flat correction problem can be seen..
Ha: upper left corner is the problem while 3 other corners are ok
O3: quite well corrected
Color: well corrected
@vincent-mod I have uploaded the files; let me know if you need more data!
Thanks Geordan, I'll have a close look today!
So I do see a big shadow it seems on the top left, that must be the prism then. Haven't seen it like this much I have to say, but I also have no personal experience using prisms.
So I looked at the Ha and OIII and I see the problem I think. It seems that the background still has a bit of a signal for Ha, but is 0 in the OIII. My guess is that if you expose your flats for longer, this may be better. Try to shift the histogram to 70% ADU or something, it shouldn't clip of course but that might help.
Thanks -- I'll give that a shot when I can!
