Donuts in medium-si...
 
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June 24 2026 APP 2.0.0-beta46 has been released !

Improved internal memory configuration (lower ! memory usage), fixed beta45 startup issue, fixed Set Save Directory & 2-panel mosaics.

May 27 2026 APP 2.0.0-beta45 has been released !

Fully Multi-Threaded LNC, many improvements for the registration engine, platform upgrade, and further tuning of internal memory consumption and memory release back to OS.

Apr 14 2026: Google Pay, Apple Pay & WeChat Pay added as payment options

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.

 

Donuts in medium-size stars after integration.

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(@maximastrophoto-com)
Neutron Star
Joined: 6 years ago
Posts: 72
Topic starter  

RedCat 51/ASI294MC Pro. After integration, seeing doughnut holes in medium-size/brightness stars:

image

I thought they are slightly defocused or there's a sensor tilt issue, but I don't see it in individual raw fits files:

image

Version 1.083.

Anything I can do with settings to prevent it?



   
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(@wvreeven)
Quasar
Joined: 8 years ago
Posts: 2134
 

@mseningmail-com In processing or post-processing there isn't anything you can do about this. How do you focus the RedCat? Do you use the Bahtinov-mask that comes with it?



   
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(@maximastrophoto-com)
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Joined: 6 years ago
Posts: 72
Topic starter  

@wvreeven no, I’m using ASIAIR and ZWO EAF. The seeing may have been less than ideal at the beginning of the session, but it automatically refocused when ambient temperature dropped 5 degrees. The process had worked for me very well in the past. Do you still think it’s a focus issue as opposed to APP clipping the stars somehow in calibration process? It didn’t clip larger stars…



   
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(@maximastrophoto-com)
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Joined: 6 years ago
Posts: 72
Topic starter  

Star reduction seems to have helped getting rid of doughnut shaped stars…



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

That may help yes, but the underlying issue is still present then. Good to see though that it does make it less obvious!



   
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