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Old 13-08-2013, 11:42 PM
casstony
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casstony is offline
 
Join Date: Feb 2006
Location: Warragul, Vic
Posts: 4,494
If that means 1/40th wave RMS and 97.4 Strehl, it's a top quality objective. Maybe some context would help.

Mid tier manufacturers often present figures only for the best wavelength, while top tier manufacturers produce scopes with a high strehl ratio across a wide range of wavelengths.
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