A triplet refractor is by far better corrected than a doublet and for an explaination you just have to google the two designs. If your main focus is Astrophotography then your best bet would be to go with the triplet refractor. If you are talking refractors then colour correction is far more important than apature.
I believe the Stellarvue dealer in Australia is/was SDM Telescopes
http://www.sdmtelescopes.com.au/
but Stellarvue does sell direct into Australia...which would be cheaper. Just contact them.
Quote:
Originally Posted by tu plang
So first question and I suspect this may be the age old question with no clear answer but given the trade off between a good 90 mm doublet (say WO Megrez 90) and a good 80 mm triplet (TMB 80 or even Meade 5000 80 mm) what is the way to go? By my reckoning, less light gathering ability can be compensated by longer exposure time but poor colour correction is what it is.
Secondly, are there any Australian dealers of Stellarvue? I havent been able to find any and the prospect of expensive shipping plus running the customs gauntlet is a bit of a barrier for me. Same goes for the TMBs.
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