Quote:
Originally Posted by GrahamL
Thanks John I will contact him and see what he says 2.6 " new is around $300 for something good I believe ,, those bigger flats sure get pricey matt .
My primary was meant for one of Peters scopes but didn't make it
Mark Sutching made the optic .
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If its a 2.6" Protostar Quartz Secondary you would need a 1/30th wave Antares to match it which will cost you about $500 landed in Oz. If it's a 2.6" Protostar Pyrex Secondary you would need a 1/20th wave Antares to match it which will cost you $400 landed in Oz. Notwithstanding the Protostar Secondaries are specked as 1/10th wave that's the minimum and they are generally way better than this. The wave rating is also only part of the equation with smoothness also being very important as it reduces scatter. The Protostar Secondaries are as good as it gets in this regard.
With a Mark Suchting Primary I would be matching it with the highest quality secondary you can, which in this case will be your Protostar Secondary recoated.
Mark's mirrors are the equal of any on the planet and warrant a premium secondary.
Cheers
John B
