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I can see - albeit just - Mag 10 globs in the central-west in Sydney with my 12". However, globs have high surface brightness. Planetaries with a OIII filter go well to about mag 8-9 maybe 10 in good conditions...if I can find them. Most of the time I can't since I don't have a goto.
I relish the challenge however, of testing the limits of my skill and equipment when observing from home.
Otherwise, Wavytone's description is pretty good.
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