This actually looks pretty bad, only signal in the red channel.
Luckily there is a very good explanation. This is H-alpha data shot with a H-alpha filter.
APP can deal with this immediately and properly. You don’t need to split the channels to work only with the red channel. You can just select the H-alpha debayer algorithm to immediately show the H-alpha monochrome data collected with the Canon 6D of Vincent.
I apply the H-alpha debayer algortihm in 0) RAW/FITS menu, by selecting Hydrogen-Alpha in the Bayer CFA algortihm dropdown box.
Again the single light, with H-alpha debayer, and next to it, the calirbated H-alpha data, everything is shown with the auto DDP function of APP, so you get automatically stretched preview data on your screen from your linear data. So all data stays linear.
