Quote:
Originally Posted by gbeal
A simple solution I reckon. Cut it neatly, and (assuming it is a metal tube) get a ring attached to the inside of one of the sections. This then allows the other section to "slip over and not" this ring. Then use those "over-centre" latches, Bunnings here have them. About 4 around the tube would be sufficient.
And no, the "thickness" of the cut should not affect the focus etc at all. Make sure the cut is neat, straight, and tidy though.
Gary
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+1 for Gary's suggestion.
Make sure you mark the 2 halves so they always go back together the same way (should be easy if it has a folded longitudinal seam

).
I wouldn't recommend MDF for the job. It's not appropriate for the dewy conditions you will encounter.
Do a search for pictures of Bird's newt as well, if you want inspiration. They are in IIS somewhere. He has a 2 or 3 piece tube depending on which mirror he wants to use in it.

... and takes excellent images with it!
Al.