Pixelmath Expression RGB (replace XXX with proportions) qeSII = XXX qeHa = XXX qeOIII = XXX R: max(max((0.2196*SII)/qeSII, (0.4510*Ha)/qeHa), (0.0078*OIII)/qeOIII) G: max(max((0.0039*Ha)/qeHa, (0.9961*OIII)/qeOIII), (0.9373*(Ha*.25))/qeHa) B: max(max((0.431*SII)/qeSII, (0.1216*Ha)/qeHa), max((0.8275*OIII)/qeOIII, (Ha*0.25)/qeHa)) Tim Hutchison's Presentation: ua-cam.com/users/livecu76vNPq4Tc?si=Ev7g0NO2Ue35qLh3 Doug from @AstroAF video on HDR Orion: ua-cam.com/video/1eeHur-y0qE/v-deo.html Affiliate Links of my gear: ZWO 294MM Pro Camera: bit.ly/3tZmjOo HEQ5 Mount: bit.ly/3O7VQVz (mine is Orion Sirius, which is equivalent) ZWO Filter Wheel: bit.ly/3Soo5lw Optolong Filters (LRGB, SII, Ha, OIII): bit.ly/3SlEPtJ (the Ha and OIII narrowband filters are better than what I have) Skywatcher Evostar 80mm: bit.ly/4bfVjev (equivalent lens) USB RJ45 Cable: bit.ly/48FRj50 (connects mount to laptop directly; mine is a different brand, but this should do) ZWO Autofocuser: bit.ly/425XUDB 0.8x Reducer: bit.ly/3tQlbg7 (mine is Orion, but this should be equivalent)
Thanks for the shout out!! Isn’t a prerequisite to being into astrophotography that you have to be a bit weird? 😂 Excellent pixelmath demo and Great image Mark! Cheers! Doug
Yes, I think so! Whenever I use this technique, the stars look pretty natural (a lot of nice natural blue looking stars). But, that has just been my experience (so maybe I'm wrong). There is probably a way to incorporate just the stars into the Hubble palette too with masking/starnett++ etc. :)
That's a good question! I don't know to be honest! But if you did it would be much harder to figure out because the RGB filters are broadband and aren't made for just one emission line... 🤷♂️
Pixelmath Expression RGB (replace XXX with proportions)
qeSII = XXX
qeHa = XXX
qeOIII = XXX
R: max(max((0.2196*SII)/qeSII, (0.4510*Ha)/qeHa), (0.0078*OIII)/qeOIII)
G: max(max((0.0039*Ha)/qeHa, (0.9961*OIII)/qeOIII), (0.9373*(Ha*.25))/qeHa)
B: max(max((0.431*SII)/qeSII, (0.1216*Ha)/qeHa), max((0.8275*OIII)/qeOIII, (Ha*0.25)/qeHa))
Tim Hutchison's Presentation: ua-cam.com/users/livecu76vNPq4Tc?si=Ev7g0NO2Ue35qLh3
Doug from @AstroAF video on HDR Orion: ua-cam.com/video/1eeHur-y0qE/v-deo.html
Affiliate Links of my gear:
ZWO 294MM Pro Camera: bit.ly/3tZmjOo
HEQ5 Mount: bit.ly/3O7VQVz (mine is Orion Sirius, which is equivalent)
ZWO Filter Wheel: bit.ly/3Soo5lw
Optolong Filters (LRGB, SII, Ha, OIII): bit.ly/3SlEPtJ (the Ha and OIII narrowband filters are better than what I have)
Skywatcher Evostar 80mm: bit.ly/4bfVjev (equivalent lens)
USB RJ45 Cable: bit.ly/48FRj50 (connects mount to laptop directly; mine is a different brand, but this should do)
ZWO Autofocuser: bit.ly/425XUDB
0.8x Reducer: bit.ly/3tQlbg7 (mine is Orion, but this should be equivalent)
Thanks for the shout out!! Isn’t a prerequisite to being into astrophotography that you have to be a bit weird? 😂
Excellent pixelmath demo and Great image Mark!
Cheers!
Doug
Thanks, Doug! It probably is a prerequisite 😅😂
Brilliant video. Thank you so much
Thank you!
WHAT ! that's so insane wow 😱
I know! When I first saw it I was amazed too :)
Nice video and technic! I wonder if that could be used to get better RGB stars from NB data 🤔
Yes, I think so! Whenever I use this technique, the stars look pretty natural (a lot of nice natural blue looking stars). But, that has just been my experience (so maybe I'm wrong). There is probably a way to incorporate just the stars into the Hubble palette too with masking/starnett++ etc. :)
Nice. I leaned quite a bit
Is it a good idea to adjust for QE when using RGB filters too?
That's a good question! I don't know to be honest! But if you did it would be much harder to figure out because the RGB filters are broadband and aren't made for just one emission line... 🤷♂️