Hi Geoff,
Yes, I noticed a significant improvement when using 3nm filter over the 12nm one. In my area you can only see brightest stars, so that's why I went for a 3nm filter. Stars are also much smaller with this filter too.
I blended data and used H-α data as a Luminance channel to create a LRGB image from narrowband data. Would love to be able to use RGB filters, but for that I need to move away from the city...
Thank you for your kind feedback :-)
Slawomir
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