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150mm Skywatcher Achromaitc F/8-Tuning air Spaced doublet
Hello I own a skywatcher 150mm Achro refractor -I cleaned off Moisture btewween the doublet lens -I can see some Alignment marks on the sides of the Doublet lens -But when I line them up I still dont get a good image - Tony - Any Info Available - on tuning -- Tony
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