Aperture rules BUT only if ou use it!!
I have been tempted to get a bigger scope several times but have resisted. The 8" is easy to transpot and carry out into the backyard for a quick look or for a long session. It is no "little" brother to the larger scopes so don't get too carried away with the aperture rules rule - you have to use it.
Thiink is from Bathurst - lots of dark skys. The reason I am building a 6" - not a 10" or bigger - travel scope is the dark skies I encounter at Narrabri, where I travel to often, would probably be similar to those at Bathurst.
My point - don't discount the 8" just because the 12" is cheap enough to buy. Its a great scope, I use mine at Linden Observatory which has beautiful views of Sydney with the light pollution attached and can still pick out heaps of DSOs. When you take it to a truely dark site it really blows you away.
Remember, you have to be able to use it regularly.
Cheers
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