Share:
Notifications
Clear all

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.

 

How to generate a master flat from light frames?

5 Posts
3 Users
0 Reactions
4,044 Views
(@schullerfred)
Main Sequence Star
Joined: 7 years ago
Posts: 19
Topic starter  

Hi,
sorry if this was already described somewhere, but I couldn't find it... is there a way in APP to generate a master flat using a large number of light frames?

Cheers,

Fred


This topic was modified 7 years ago by SchullerFred

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

Hi Fred,

Yes there is. You need to load all flat subs into APP in the 1) LOAD tab. Then if you have bias and dark frames and/or a master bias or dark, load those as well. In 2) CALIBRATE scroll all the way down and make sure that “create MasterBias, -Dark, -Flat” is ticked. Then click “create Masters and assign to Lights”.

 

HTH, Wouter



   
ReplyQuote
(@schullerfred)
Main Sequence Star
Joined: 7 years ago
Posts: 19
Topic starter  

Hi Wouter,

thanks for your answer. But what I meant is to use light subs (with stars, and nebulae, and everything in) with the hope that taking a large number of them and with some clever averaging, it could be possible to build a flat field.
I usually take dark frames during each session, it's quite easy (simply putting the cap in front of my scope, and using the same settings for the capture as for the light frames); but capturing flat frames is more tricky, since it requires a color neutral uniformly illuminated field...

Fred



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

Hi Fred,

Ah sorry, I misread. To my best of knowledge this is not possible with APP.

 

Wouter



   
ReplyQuote
(@annehouw)
Red Giant
Joined: 9 years ago
Posts: 55
 

Hi Fred,

 

Maybe this is what you are looking for?

How to correct a stack for vignetting

 

Regards,

Anne



   
ReplyQuote
Share: