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Photometric Color Calibration, HELP? !!
Feb 11, 2022 08:36:37   #
Bittmoore Loc: SE Wisconsin
 
So I recently revisited SiriL as I'd heard there'd been some changes since I last wrestled with it a year or so ago. Quite interesting now with a new interface and new or updated tools but it is still giving me fits trying to figure out what I'm doing wrong.
I've done a bit of manual preprocessing of data (gradient removal) as well as used premade scripts.
The new interface (version 1.0.0_rc2) is a radical change from what I'd previously been bashing my head against and took a minute or three to get accustomed to. It's now possible to preprocess, process & post process images all within SiriL though final touches still require a visit to G.I.M.P./RawTherapee/PS/...
As we've had nothing but clouds for longer than I can recall I've gone back to previous captures in hopes of learning SiriL's newer capabilities and the PCC (photometric color calibration) caught my eye. Not quite sure but sounds like it uses the same process as PI. However I have yet to get it to succeed. From what I'm reading my image (T4i/650D & Canon 75-300mm @ 75mm) is too wide field. I've tried cropping image (several different), still fails. Tried with linear, failed. Tried with autostretch, failed. I have submitted to http://nova.astrometry.net/ but have no idea what data I can use in PCC or how.
Any advice on successfully using PCC?
Any willingness to look at the file and try and see?
Any interest in processing the stack for deficiencies in my abilities? (I know they exist)

This is what I'm working on. Original data acquired Nov. of 2019 and processed with DSS & G.I.M.P. 140 light (75mm, f/4.0, 6sec, 3200 ISO), 80 darks, 30 bias frames
This is what I'm working on. Original data acquire...

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