Apr 9 2026 APP 2.0.0-beta40 has been released !
It has a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration, for mosaics even faster! 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. Improved Outlier Rejection with LN 2.0 rejection. macOS CMD+A works now in file chooser ! And more, all will be added to the release notes in the coming hours...
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.
Good Morning,
Recently, I had a fine 3-day stretch of clear weather, and after an investment of 6.5 hours, I have this nice narrowband image of M27 in 7nm Ha and OIII. I like APP's HOO2 palette because I like the colors, but more importantly, it does a fine job of preserving star colors.
A friend introduced me to LRGBHOO, but after capturing only 1.5 hours of LRGB, I was disappointed but not surprised. I lost the faint, delicate narrowband nebulosity in the outer shell. I need more broadband integration time, but I think that I may never be able to capture enough. Here is my reasoning. (If anyone sees a flaw in my logic, please speak up.)
Narrowband is great, particularly for those suffering from high light pollution. The "magic" happens because my filter passes through only 7nm of light pollution. Now compare that to a standard red filter that lets in 100nm of light pollution. In essence, the narrowband filter transports me from my so-so Bortle 5 skies to a Bortle 2 or 3 remote site. But with regular LRGB, I am stuck with the full Bortle 5 light pollution. The only way to overcome all of that noise from light pollution is to stack and stack some more.
Do you see the problem? Even after investing lots of time into LRGB, I may still lose that faint narrowband nebulosity. I would be happy to discover that I've committed an error in my logic. If not, are there other techniques I can use?
Thank you,
Brian
Yes I do see your problem with that, I must say I don't have too much experience with those palettes. I do think that it'll always be a compromise, because you always need to end up in the RGB space. Being able to combine very nice RGB stars with narrowband usually then requires a bit more processing than APP currently has I think. Luminance will also subdue colors, Mabula is going to look at that specifically to see if he can improve on that, for Luminance I would reduce that mix to about 50% or less, you can experiment a bit to your liking.
Regarding the bortle 5 issue, yes that unfortunately can't really be dealt with unless you want to go full photoshop trickery. 🙂 A darker site or way more data is likely the only way then.
