Quick background - yesterday I was killing some time reading threads on narrowband filters and it occurred to me that in Brisbane city's light polluted (and probably even moonlit) skies I could use OIII:Ha:SII filters to get some pretty clean "Hubble palette" deep sky images. I had read that some shoot Ha in the city, then when they get to dark sites they shoot the RGB and put it all together at LRGB. Cool idea.
Next thing I know, click click click, I had pulled the trigger at Bintel and bought myself all 3 1.25" Astronomic narrowband filters! Please don't tell my wife.
So back to my question. I note that it's quite common to use Ha as the L channel in LRGB shots. But I got to thinking, what if I shoot a false colour hubble palette type shot, then convert that to grayscale, and use
that as the L channel instead of just the Ha? Would this improve things, or better just to stick with Ha? Has anyone tried this?