Flats that don't re...
 
Share:
Notifications
Clear all

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.

 

Flats that don't remove artifacts?

3 Posts
2 Users
0 Reactions
1,952 Views
(@jerryg7)
Brown Dwarf
Joined: 5 years ago
Posts: 3
Topic starter  

Hello folks,

Tonight I stacked a couple hundred shots of Markarain's chain taken a couple days ago (30sec images, ISO400, in bortle 8 skies, no filters).  I have a Stellarvue 102mm telescope, stellarvue field flattener made for this telescope, and I'm using an Ha modified Canon 60D DSLR for the imaging.  I am having trouble understanding why the highlighted artifacts don't calibrate out with my flats?  I can actually see this artifact in the master flat but for some reason this shows up on this (and other stacked pictures of other targets.)  For some reason this one does not get removed in the calibration/registration process and I'm not sure why.  Any ideas?  I am also attaching a link to the stacked image and calibration files if that helps (in dropbox given their sizes). 

Dropbox Logo Dropbox File (Private or Invalid)

Thanks in advance for any insight you could provide.  I do see other artifacts that seem to be removed but some do not.  Is this perhaps an internal reflection and not a dust mote...does it matter?

Screenshot 2021 05 10 200726

 



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

Hi Jerry,

Do you also use proper calibration frames to calibrate the flats etc? Thanks for the link, I'll have a look today.



   
ReplyQuote
(@jerryg7)
Brown Dwarf
Joined: 5 years ago
Posts: 3
Topic starter  

@vincent-mod  Yes sir, I use a Master Bias frame I'd taken from some shots perhaps a few weeks ago and I use dark frames each night along with flats shot at the end of the session.  I'd included the 3 masters in dropbox.  



   
ReplyQuote
Share: