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Help with Hubble Palette using L-Synergy + L-Extreme on ASI294MC Pro

Optolong L-Synergy SII/OIII 7nm 2" ZWO ASI294MC Pro Processing HOS One-Shot Color
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Giampiero Lilli avatar
Giampiero Lilli avatar

Hi everyone,

I recently purchased the new Optolong L-Synergy filter.
It’s a 7nm dual-band filter for SII and OIII.

I already own the L-Extreme filter, and I’m trying to create a Hubble Palette (SHO) image of the North America Nebula (NGC 7000) using these two filters with my ZWO ASI294MC Pro color camera.

I’ve been experimenting with PixelMath, but so far I’m mostly going by trial and error.
Is PixelMath the right tool for this kind of combination?
Could anyone suggest a good workflow or method to achieve a proper SHO mapping using these filters?

Thanks in advance!

Clear skies,

Giampiero

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andrea tasselli avatar
andrea tasselli avatar
Foraxx palette- Look it up!
Gary Cummins avatar
Gary Cummins avatar

Here you go

https://youtu.be/t_hU3cHkKHI?si=A4ndfpSL-FvRB3TI

cafuego avatar
cafuego avatar

I’ve been contemplating getting similar filters for my 294MC, to allow me to image when the Moon is too bright (I am under bortle 1-2 skies, so I don’t need them otherwise :-)

I borrowed a filter wheel from a friend, but that only has 1.25” narrowband filters for a mono camera in it and doesn’t fit my 2” ZWO Ha/OIII filter. However, I did shoot some narrowband data during the full Moon last week and over the weekend, and used that data to play with PixelMath (in siril).

The formulae I used are the ones from https://remoteastrophotography.com/foraxx-palette-script-dynamic-narrowband-combinations/ and they seem to produce colours that are not entirely dissimilar from what I would get when shooting with only a UV/IR cut filter during new Moon.

  • R = (Oiii^~Oiii)*Sii + ~(Oiii^~Oiii)*Ha

  • G = ((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

  • B = Oiii

Tim Ray avatar
Tim Ray avatar

I would run both filter ML’s through DBXtract to produce Ha, Oiii, and Sii mono images and then proceed with a normal NB workflow to your desired results.

CS, Tim

Giampiero Lilli avatar
Giampiero Lilli avatar

Thanks all for help! Your suggestion was really helpful — running both ML filters through DBXtract and Foraxx palette worked perfectly and allowed me to get my first results.

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danieldh206 avatar
danieldh206 avatar

This is like processing images taken with the Askar D1 and D2. I found this tutorial the most straightforward. https://youtu.be/N4nVjYaDfPc?si=3OWskcrCVjAXPPEB

I found this way is similar to working with mono SHO.