Quote:
Originally Posted by Kal
Mike, now that we are in a free discussion area I can ask you, what are the incorrect bits of info regarding your AP152 scope in that Thomas Back article? Curiosity has the better of me!
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Mainly that it is
not an
air spaced triplet using FPL-51 as Thomas claimed but in the masters own words "It is an oil spaced lens using FPL53 center element" and I have kept the email to prove it should I ever need to

. Just inspecting the objective lens with your own eyes it seems quite obvious too.
Mike