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Visual observing achromat or apo
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12-12-2018, 12:40 PM
astro744
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Join Date: Apr 2007
Posts: 1,244
Straight through will be upside down and for terrestrial that is not ideal. Also without diagonal in place an extension tube may be needed. Not sure if the TV-60 will come to focus without diagonal or extension; I'll have to try it.
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