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Ah ok. Expensive but no better optically than the SW.
A Zygo test is all very well, but meaningless unless the pass/fail criterion is defined, either peak or rms wavefront error, strehl etc...
Another trap with the Russian scopes is how to fit it onto a mount - the Russians often fit some nonstandard base - make sure it comes with a vixen or Losmandy dovetail rail or you have to add this yourself.
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