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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.

 

Memory problem - could I stack "in installments" 😉 ?

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(@grzegorz-zwierzchowski)
Brown Dwarf
Joined: 7 years ago
Posts: 3
Topic starter  

Hi!

Great to be here and TNX 4 the great piece of software.

I got a problem with stacking large group of subs (about 800 subs), and it newer finises especialy when LNC is enabled . I was trying to complette the task on different machines with 16, 24, and 32 GB of ram. Every time - no memory error.... RAM is of course enabled for APP in settings.

Can I do the trick (using saved calibrated frames) and integrate groups of for example 25 frames and then stack the product ? It make sense ? What about noise ? SNR ? and all the statistic ? 

Another question on calibration area - I have prepared (on one run with all calibration frames loaded together) master bias, master dark, master flat,  master dark for flat, and bad pixel map. So, standard i think..

- but for my camera ASI071 - its significanly better not to use bias... i know it from practice...

So then if I procced with calibration (want to save calibrated lights only) and load only MD, MDF, MF, BPM, and I have info from console that MDark, MFlat and BPM is used its OK ? Lights ar not affected by Bias, and MD and MF are (from preparing masters using bias ?) So then its neccessary to prepare masters again - now without loading bias subframes ? Or can i use it. Want to be sure that biases are not redundantly used in the proces.

TNX !

  



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

800 subs! Now that is a lot indeed, I personally think it will be fine to do sub-stacks and combine those later into 1, but indeed... what about the statistics in such a case. For that I'll have to tag Mabula (@mabula-admin) as he's the maths-wizard. 😉

Your second question I have a bit of trouble understanding properly, sorry. So you can just calibrate all your subs without bias, just load it all in and only use MF, MD and BPM. But is your experience of not using a Bias based on processing it in APP or in other software? If the latter is the case I would still suggest to give it a go with APP as it uses some advanced statistics not to "damage" your results using that. You can also have a look at the statistics processing with and without, for instance by looking at the background-column values and SNR/Noise columns. And in the end just by eye ofcourse.



   
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