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Old 06-11-2013, 09:35 AM
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Location: Melbourne
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Originally Posted by RickS View Post
Spot diagrams don't tell you a lot. I want to see ray-fan plots!
We can only compare the results that manufacturers claim.

Still - I wonder if RC designs have been superseded?

No matter what system you buy it always needs a corrector
which is just extra glass that will introduce it's own aberrations -
especially halos on bright stars.
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