A 20" F3.3 for Paul in Ewa Beach, Hawaii...

Here's a fun project -- a 20" F3.3 for Paul in Ewa Beach, Hawaii. The optics will be a Hubble primary, an observatory grade curved-vane spider and Antares heavy-lift focuser. Note the 9-point mirror cell is made with laminated Baltic birch at 1.25" thick  -- less weight than an aluminum cell, but just as rigid. This will be an 8-tube truss telescope.

(Note the yardstick at the bottom for a size comparison).