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Thanks Sab
NGC 1977 is listed as both emission on reflection in my data (Uranometria 2000 Deep Sky Field Guide) so the Neb filter definately had an effect. Give it a try and see what you think!
Tried for about 10 mins to get the dark featue in NGC 1999, varied the power, tried with and without barlow, tried the neb filter. Even tried sitting still for a few minutes breathing deeply to increase oxygen flow to my brain! Still couldn't see it, about the only thing I didn't try was an OIII filter, but that shouldn't work so didn't bother.
Malcolm
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