May 27 2026 APP 2.0.0-beta45 has been released !
Fully Multi-Threaded LNC, many improvements for the registration engine, platform upgrade, and further tuning of internal memory consumption and memory release back to OS.
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.
Does anyone have an opinion about where the vertical light bands on the left and right edges are coming from? This required so much cropping that I wasn't able to get it all and keep the large nebula intact. This image was the result of 310, 60 second subs using a RASA 8 at F/2, an Optolong L-extreme filter, and a ASI533 OSC camera, unity gain. Dithering at every 2nd frame, 10 pixels. Flats, dark flats, and darks duly acquired and applied. There was a meridian flip as well.
Happy for any criticism or suggestions which could enable me to get a better result next time. Artifacts like this have been occurring repeatedly, and I don't know what is causing this problem.
Hi Paul,
Those edges are caused by the fact that the subs do not exactly overlap because of dithering. You see the regions where there was less signal accumulated because less frames cover those areas. You can blend those edges better by enabling MBB in tab 6. The black edges will not disappear and the only way to get rid of them is to crop.
Â
Wouter
@wvreeven Thanks. But I DID enable MBB and I always do. This remains a serious problem. Â
I am between a rock and a hard place. If I don't dither heavily, I get pattern noise. Â
@pswilson1 What value did you set MBB to? The default 5%? If yes, try a higher value like 10 or even 15% and see if that helps.
Dithering really is useful, even if that means having to sacrifice some of the FOV. The California Nebula seems to be a pretty large object for your telescope and camera anyway and I understand that it is hard to crop that beautiful image!
Yes, default. Thank you, I will definitely try setting this MBB value higher as this problem has recurred several times.
Dear Paul @pswilson1,
I see that the difference in Field of View for your light frames changes a bit. Now in combination with the strong signal of the nebulosity I would suggest you to try:
5) Normalize, use advanced normalization
I think that should fix it 😉
If not entirely okay yet, enable LNC first degree with a couple of iterations. That should really fix it in combination with MBB 10% roughly.
Please let us know if this helps 😉
Mabula
 Wow! Those suggestions made a HUGE improvement. I am embarrassed to say that I didn't even realize that normalization could be bumped up to "advanced". Plus I did run the LNC 1st degree at 2 iterations. Thank you so much for these instructions. I have learned something.
Â
