sorry if this question has been asked before - since sveral months I am doing OSC narrowband astroimaging of emission nebulae with a modified Canon 6D DSLR and IDAS NB1 filter.
I think the NB1 filter is able to retain an acceptable color balance, in fact I can process the images in PixInsight using the same workflow I apply for broadband and do not have difficulty in preventing the stars to have a wrong color cast.
Still, the nebulae in the final images show a predominant red color while green/blue is typically very weak.
Extracting the 3 R, G, B channels indeed there is good amount of green and blue signal in the image (I noted the signal in G and B images seems to be the exactly the same).
I would appreciate to have some guidance or to be directed to a tutorial that I can follow to achieve a better color richness in my images (please note that I have PixInsight but unfortunately cannot use StarNet due to old CPU).
An additional question: is there a duo- or tri- narrowband filter that would work better with the 6D?
I read a lot of messages about the Triad, STC, Optolong etc but seem that these will make the color balace more difficult to obtain.
Thank you in advance and Clear Skies!
Edited by Marco1968, 23 October 2021 - 10:42 AM.