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Folded Refractor

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#1 JWW

JWW

    Apollo

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Posted 15 April 2011 - 10:59 PM

Does anyone happen to have a link or two to sites that show the actual constrution and design of a folded refractor that isn't made of wood?

Regards,
-JWW:

#2 bertb

bertb

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Posted 17 April 2011 - 09:32 AM

Beware of making a tube of something else than wood. Only a carbon tube will be usefull, because of the thermal expension. A folded refractor is very sensible for miscollimation when the tube gets a little shorter during the night, when temperture drops.






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