Flats not doing any...
 
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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.

 

Flats not doing anything

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(@petelaa)
Main Sequence Star
Joined: 9 years ago
Posts: 15
Topic starter  

It used to work fine, but lately my flats don't do anything.

Some screenshots:

list
lin
cal

.

The first image is the linear, the second is calibrated. Clearly, all dust bunnies remain firmly in place. I have used default settings in the calibrate tab. Where do I start to debug this?



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5363
 

Hi Petra @petelaa,

That's looks a bit odd indeed ;-(, this is on APP 1.059 ?

I am working an a very big upgrade of APP's calibration engine for it's next release.

It would be most usefull if I could have a look at your data for testing purposes? I would only need a a couple of lights, bias and flats.

If okay, send them to support@astropixelprocessor.com using wetransfer.com.

Are the flats, lights and bias all the same ISO ?

Kind regards,

Mabula



   
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(@petelaa)
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Joined: 9 years ago
Posts: 15
Topic starter  

lights and bias iso 1600, flats iso 100, BPM don't know. But this used to be no problem at all. Shall I send 5 of each to you?

Not sure if I use 1.058 or 1.059, will look that up when I send you the files, tomorrow .



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5363
 

Great @petelaa 😉 thank you.

The BPM doesn't matter.

If the flats are ISO 100 , APP  (version 1.059 and lower) needs an ISO 100 masterbias as well for the flats. ( In APP 1.060, this requirement will be removed though.. )

So currently, without a ISO100 masterbias, the bias signal and pedestal/offset won't be subtracted from the flats and this is needed for flat-field calibration.

So for now, shoot some ISO100 bias and create a masterbias, then create a new masterflat where this masterbias is loaded next to the flats. Then the masterflat should work.

Cheers,

Mabula



   
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(@petelaa)
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Joined: 9 years ago
Posts: 15
Topic starter  

Great! Will do!



   
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(@petelaa)
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Joined: 9 years ago
Posts: 15
Topic starter  

It worked, thanks. I won't be sending you the files now.

Little bit of feedback though: if APP is not applying the flats, then why (see first screenshot opening post) does it label the light with an 'F'?



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
Posts: 5363
 

@petelaa,

Thanks, glad it worked now 😉

Yes, good point, it should have applied the flats though, but since the masterflat didn't have the bias pedestal/offset subtracted, it looked like nothing was happening. ( If the exposure of the flats was very short then this could be the case.)

I'll make sure that in APP 1.060 things like this won't happen again though 😉

Mabula

 

 



   
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(@petelaa)
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Joined: 9 years ago
Posts: 15
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👍 👍 Thanx & keep up the good work!



   
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