Clear skies Damien
Burgess Optical 91mm Triplet APO
Canon 40D (astro modified)
Quote: I'm more than a bit worried about flexure in the tube.
The Cheapest Astronomer in the World gets excited by Jupiter. Builds dob, builds eq platform, arranges to borrow webcam...
Quote:Cheers Brad,The mirror is only 12lbs. I made a mistake in my opening post, the mirror is only 1" thick. I'm guessing with the cell it will all come in at about 18lbs with the mirror when done. The tube will be about 25lbs. By the time I add the spider, secondary and focuser it will probably be close to 50lbs realistically. But these are guesstimates.My G11 is going to hate me.
Ed Jones ........... The best data is an interferogram, the best analysis is from an honest optician.
Quote:I have a friend who is a carpenter and between us we came up with a design for the tube made up of plywood rings held together with strips of wood and wrapped in a flex-ply sheet.
-DannyMy warehouseMy Channel
20 inch f8 Chief Ed Jones designed and a 17 f9 Zanbuto Wide Band Chief Mike Jones designed .Both unobstructed telescopes .