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.
So Ive been playing around with data from my OIII filter and when I look at a single calibrated light, everything looks normal, but then when I integrate, I get what looks like light pollution with bad vignetting. Im not sure what Im doing wrong. Any ideas would be helpful.
the first one is a single calibrated image and the second is a stack of 30 x 180 sec lights with 3.5 OIII filter and 33 flats and dark flats with a master dark and a BPM
@thextra10th Hi Zachary. Did you shoot de flats and dark flats at the same gain, offset, temperature and exposure time? Did you shoot the darks for the master dark at the same gain, offset, temperature and exposure time as the lights? What does the integration look like if you do not apply the flats, i.e. only apply the master dark and BPM? What version of APP are you using? If 1.082 or before, can you enable 32 bit masters in tab 2 and see if that helps?
@wvreeven. Yes, the flats and dark flats were all done at the same gain, offset, and exposure time. I didn’t cool the camera to the same temperature as I didn’t think that mattered for flats. The Darks were also done at the same temp, gain, and offsets. I have not tried integrating without flats, I’ll do that today. I will check my version to see,
Thanks
@thextra10th Thanks for the info. The temperature for the flats indeed doesn’t matter so it looks like you did this right. Do your flats for other filters work well? Any differences between taking the OIII flats and the other flats like a different light source or a different location where you took them?
@wvreeven here is the integration without flats, it seems slightly better.... the other filters all seem fine. I used the same light source, and location for the flats. in this last go around I did try using a t-shirt between the light panel (using the pegasus astro light panel) and scope, but didn't seem to help. the master flat doesn't look great in my opinion, so I'm thinking that is the root problem.
@thextra10th That indeed does look better. What light source do you use for the flats? Perhaps it is not compatible with the OIII filter pass band? Or maybe the OIII filter lets pass through IR radiation from the light source that gets picked up by the sensor?
@wvreevenim Im using a Pegasus Astro flat panel for my light source. I'm currently running an integration of trying 3 sec flats and dark flats even though it was only about 20-30% on the histogram but the overall flat looked a little better. Its very interesting that this one filter doesn't behave like the others. Im also using the ZWO 294MM at 2x2 binning
@thextra10th You probably know but make sure that all lights, darks, flats, dark flats etc have the same binning. Combining 1x1 and 2x2 binning will not work.
Apart from that, fingers crossed that the new flats work!
@wvreeven yeah, all are matching and no luck with the new flats. I'll need to look at other OIII data, maybe it was just a bad night.....
