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I don't know. After doing quite a bit of research on the general QC & optical quality of both Synta (Skywatcher etc.) and GSO, I wasn't impressed with the amount of current GSO owners complaining about faulty coatings on their primaries & in some cases secondary mirrors.
I ended up buying a SW to avoid any problems in those areas.
'Your mileage may vary' as they say in the classics..
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