Quote:
Originally Posted by keppar
Geoff
How do you know if your scope is not up to par.And sorry what does QC stand for ?
Graham
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QC=Quality Control.
The easiest way to test a refractor for the average user is by using a star. You need to look at the image slightly inside and outside focus. The nearer they are to identical, the better the scope. You also need to look at false colour. An APO should show almost none, an achromat will show some slight blue fringing around bright planets. The book to get is by Souter "Star testing astronomical telescopes"
Geoff