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Thanks erick, the eyepieces I have, or borrowed, I should say are Tele-Vu, I think thats spelt correctly, and a 2X barlow tube all made in Japan as they are a few years old. I have been told thats a very good brand. I'm still interested to know if if there's any difference in the optical quality, like the primary mirrors, between a Skywatcher / Saxon and a Bintel / GSO.
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