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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.

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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.

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flats issues

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(@gmehal)
Main Sequence Star
Joined: 7 years ago
Posts: 23
Topic starter  

Hi all, received my new 2600MM camera coupled with a redcat 71 and I'm having some issues with combining my RGB files in AstroPixelProcessor using flats that I've taken. As you can see the combined file looks a bit weird in my opinion and also it seems as if the flats are doing absolutely nothing to get rid of the dust Motes, vignetting and things like that. Looking for some advice as to what I might be doing wrong. I've been using AstroPixelProcessor for the last few years and I'm not a novice, but I'm just stumped here.

m13 2600mm no flats2 Blue St
MF IG 100.0 E 0.025s ZWO ASI2600MM Pro 6248x4176  Green 1 St
MF IG 100.0 E 0.025s ZWO ASI2600MM Pro 6248x4176  Blue 1 St
MF IG 100.0 E 0.041666s ZWO ASI2600MM Pro 6248x4176  Red 1 St
m13 2600mm no flats2 Green St
m13 2600mm no flats2 Red St
Screenshot 2023 07 07 at 1.52.01 PM


   
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(@jure)
White Dwarf
Joined: 5 years ago
Posts: 16
 

Hi,

I had something very similar with my ASI2600MM after switching from AsiAir Pro to N.I.N.A. I had always used flats + bias, but with the switch to N.I.N.A. I was getting something like you are getting all of a sudden.

Solution? Dark Flats. I aim for histogram peak around 33% rather than the recommended 50% and all is well. Why Dark Flats? I have no idea, really, but it solved my issue. 🙃 Also, I usually create all my master calibration frames before integration.



   
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(@connor231)
Neutron Star
Joined: 7 years ago
Posts: 123
 

My understanding is that you can't use flats+bias with the sensor in the 2600 because the bias does not behave in a linear way. As Jurij suggested, you should use flats+darkflats with this sensor. It worked for me.

JC


This post was modified 3 years ago by John Connor

   
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