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Originally Posted by AstroJunk
It turns out that the 15" optics are only $600 less than the 18", so there is as good as no difference in price for a much smaller aperture - all of the other components will be the same, just a little less wood and a little shorter truss tubes.
I think that given the costs involved that the 18" does seem to be the practical mimimum size for value for money. And from experience it is quite portable (relatively!) and only requires a single step near the zenith.
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Geoff, I would have to agree with AstroJunk here. The 18" is a very portable scope. A 2 step stool would be all you need; Think of that extra aperture.
