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I've had a Skywatcher 150mm F8 achromat for about 8 years and I wouldn't part with it.
I replaced the focuser with a WO unit (a GSO one would just as good) and although there is some colour fringing, the views are fantastic.
With a minus violet filter, I can't see any fringing at all.
If they're still made as good as mine. You should consider one at least.
Cheers,
Luke
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