NEWBIE - Calibratio...
 
Share:
Notifications
Clear all

19 June 2021: Our upload server https://upload.astropixelprocessor.com/ has been migrated successfully to our new office with higher upload and download speeds (nearly 10MByte/sec up/down ) ! We now have 1 general upload user called: upload with password: upload. The users upload1 - upload5 have been disabled.

31 May 2021: APP 1.083-beta2 has been released ! APP 1.083 stable will follow soon afterwards. It includes a completely new Star Reducer Tool, New File Saver Module, Improved Comet registration and much more, check the release notes here!

DOWNLOADS are available HERE!

 

NEWBIE - Calibration Question  

  RSS

(@arash)
Hydrogen Atom Customer
Joined: 3 years ago
Posts: 2
August 2, 2020 08:52  

Hello all,

I am trying my first process with APP.  I loaded my lights and calibration frames. After step 2, master calibration files were created, however while viewing in l-calibrated mode, strong vignetting still shows and the image is basically displaying same as linear. Master flat seems to be created correctly and I see 'CA' showing in front of filenames, so I am assuming calibration frames are applied.  See screenshots below. What am I missing?

Screen Shot 2020 08 01 at 11.44.28 PM
Screen Shot 2020 08 01 at 11.43.55 PM

ReplyQuote
(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3813
August 2, 2020 14:19  

Hi arash and welcome!

So just CA doesn’t mean they were calibrated with the flats, it seems they were not applied and the likely reason is because they are not compatible with the lights. They should be made with a proper bias or darkflat and have the exact same dimensions as the lights. Is that the case?


ReplyQuote
(@arash)
Hydrogen Atom Customer
Joined: 3 years ago
Posts: 2
August 2, 2020 19:07  

Thanks for the reply Vincent!

Lights were shot at ISO 400 and Fuji RAF dimensions are 6000x4000, but in APP in the dimension column for lights it shows '6000x4000 - 6048x4038' where on Master Calibration files (which was built by subs at ISO 400 and 6000x4000), dimension shows '6160x4032'.  I'm not sure where the second set of numbers are coming from.  See the screenshot.

Screen Shot 2020 08 02 at 9.54.15 AM

 I did have subs with different ISOs on the first run, so on the second run I only selected 30s subs at 400 ISO, which matches darks and flats.  I do not have darkflats.

 

What does 'CA' in front of the filename mean BTW? 


ReplyQuote
(@vincent-mod)
Universe Admin
Joined: 4 years ago
Posts: 3813
August 4, 2020 14:40  

Interesting, that might be something specific with that sensor type. But the flat dimensions indeed don't match. Did you use the same capture software to take both the lights and flats?


ReplyQuote
Share: