Thread: Secondary Mirror recoat (now a discussion about minimum secondary size)
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Old 15-10-2019, 09:25 PM
Jethro777 (Jethro)
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Join Date: Oct 2012
Location: Brisbane
Posts: 131
I am thinking the same - but I don't want a cheap one - I want a good one.
Yes, what do you reckon, it needs replacing?
How good do mirrors get as far as reflectivity is concerned? 94%?
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