Thread: Why don't really high-end refractors use carbon fibre instead of aluminium tubes?
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Old 06-02-2008, 05:23 PM
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Phil
Phil H

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Join Date: Apr 2006
Location: Cowra NSW
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Depend where you are imaging the focus will change no mater what the tube is made of. I find at bigging of imaging i may be closer to the east
and when i get closer and closer to the zenith the focus will change a little.
Phil
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