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A quick M31

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@warwickshireastro yes it would, depending on what you use to process.  The L-Enhance is HA/OIII at 26ish nm, so wide (similar to Altair tri-band)

If you use APP, you can use the algorithm "Extract HA" to pull out only that data.  You can then recombine this with RGB in any way you see fit (e.g. you could use the HA as luminance and have LRGB, or just use as plain HaRGB)

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