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, Im having real problems processing all my latest images. I use an ASI294MC Pro and have not had any problems in the past. I use NINA for acquisition and it all looks fine on there. However, when I include calibration frames in APP I get a severe halo in the final integration. It seems more the Flat frames rather than the Dark frames (bias arent used with the 294).
It has only recently been happening and I cant find a way around it. As an experiment Ive used old and new dark and flat frames (that have previously been fine) with the same outcome and its driving me mad. If I dont include calibration frames its then over exposed. Ive attached a screen shot of a final integration. You can ignore the dust bunny as I can usually edit any out and that was a result of me trying to look for dew on the sensor so I will correct that soon. I just cant figure it out. Its driving me mad.
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@richielisa Hi Richard, which calibration frames are you using exactly? You should use darks of the same temperature, gain, offset and exposure time as the lights as well as flats and dark flats with the same temperature, gain, offset and exposure time as the flats. If the exposure time of the darks or dark flats (or both) are different then you'll need bias frames as well.
Hi Wouter,
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Ive never used dark flats and I understand that I dont need bias with the ASI294MC Pro. As for the other frames I do exactly what you have said. In the past it has always been brilliant and its only just started doing this.
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Just trying some totally new flat frames to see if that helps. Other than that Im not sure what else is the problem.Â
@richielisa Hi Richard. For calibration of the flats, dark flats are needed. It is possible for APP to use the darks for that but then bias frames are needed to be able to properly scale the darks to the exposure time of the flats. If the darks have a different exposure time than the lights then bias frames are needed as well. In any other case scaling of the darks or dark flats cannot be done correctly which will introduce all kinds of artifacts that may well be an explanation for the result you got.
Hmmm.... I will have to look at how to do dark flats.....never done them before so if you can point me in the right direction it would be appreciated.
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Also, the new Flats Ive taken have worked well and I will need to throw the others away. Seems it was a flat problem. Thanks Wouter!
@richielisa Dark flats simply are darks with the same exposrue time as the flats. So if you take, say, 2 second flats then you'll need 2 second darks and you then load them as dark flats.
Glad to read that the new flats work!
