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Equipment Discussions >> ATM, Optics and DIY Forum

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Reged: 12/12/05

Loc: Arizona or Mexico hard to tell
Folded Refractor new
      #4521338 - 04/15/11 11:59 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?


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Reged: 10/10/08

Loc: Achterveld, the Netherlands
Re: Folded Refractor [Re: JWW]
      #4523901 - 04/17/11 10:32 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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