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?
1 reply to this topic
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.