Debayer flat, bias and dark frames at conversion?

Software Siril
1

Hi, I’m completely new to SiriL, and any image processing beyond Photoshop Lightroom.
I thing I understand most of the process, but I stumble on the first step.
I see a recommendation that flat, dark and bias frames should not be debayered when converting from RAW (I use an EOS-60Da, so the RAW files are CR2).

However, when I convert this way, the FIT files only have one channel, supposedly red, and in the flat frames I can see the Bayer pattern clearly - also after stacking. Can these files even be used in processing colour images? (would be nice, since it would save (disk) space and time)

2

Convert the cr2s to fits without debayer. Make your master frames from these non-debayered images.
When you come to pre-process your light frames with your master stacks, check ‘Debayer before saving’ at the bottom of the pre-processing tab BEFORE hitting the ‘Start pre-processing’ button. (IMO, the buttons are in the wrong order: the last thing you should hit on pre-processing is the Start button, not have options after it!)
HTH

3

Thanks. I’ll try that. Just realised that the Bayer pattern means all colours are in the image.