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.
I am uploading my sky flats i took last week could you check them they are in a folder called LRGB sky flats. I am going out to the telescope to setup for some electro luminescence flats.
Mike
Â
Just uploading some electro luminescence flats with matching dark flats could you try those they are in folder called electro luminescence. I am also going to try some plan flat just bu pointing the telescope to a blank wallÂ
Â
Mike
@moviecell
Sorry if this is irrelevant, but maybe it's something to check for as well. I have had a similar issue with geometrical illumination artefacts recently that looked like so:
Â
The cause of the problem for me turned out to be the diameter of the adapter connecting the camera to the scope. I've tried several tubes available and it was very telling:
As evident from the diagram even 1 mm counts.
Â
Â
Hi thanks for the message i am open to any ideas to found out whats going on. I will check this out but i am running 2 inch {50mm} all the way from the camera with 2 inch filters right up to the 2 inch on the back of the meade so there should be no way light should be cut off. I even used some black felt to mask the barrels just in case it was a internal reflection some how.
Â
Mike
Well has a better day today found last night on a forum a tool to calculate the distance in a optical path a optical problem is. You put in some figures for the camera and the telescope and the size of the optical problem my case the large ring in pixels and it came back with around 66mm from the camera sensor. That put it around the focal reducer took the camera off and point the telescope to the sky and i could see a large ring of light all the way around the final reducer lens.
I stripped the reducer lens out and blacked the edge of the optics then i notice the lens bevel is only just covered by the lens metal work of the barrel so i 3D printed a round lens mask that removes about 2mm around the final reducer lens. This all seems to have helped see image below i have more light loss to the edge because of the 3D mask but i can't see any rings.
I now need to wait for a clear night to take some more new lights to try with the new flats.
Mike
Excellent Mike, sounds like you're close to the actual issue there.
