Thanks for the quick replies.
That explains a lot then, i'm sure I read on here that mgnitude is measured collectivey but can be spread over a large object -well that's how I interpreted it.
I'm in central Brisbane and have bad light pollution. Sounds like a nebula filter will be a good investment and a decent set of binos, which I am on the hunt for.
Any other nebulas, other than Orion, that I'll have a chance of seeing from my location?
Cheers.
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