Hi Dave and thanks for the feedback - it gives me confidence that I’m on the right track. I was happy with the detail I could pull out of the image but am constrained by my current lack of image editing skills. Lots to learn. I was hoping for a little more OIII-ish colour but the image was always dominated by Ha-ish red/orange. At some stage I’ll invest in a true narrowband filter(s) because - as you correctly stated - the UHC-S’s two bands are quite wide to accommodate visual use (which is why I got it). Alex
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