20 inch f8 Chief Ed Jones designed and a 17 f9 Zanbuto Wide Band Chief Mike Jones designed .Both unobstructed telescopes .
Working on a 12" f4.25 single pole hybrid dob.
Quote:...It's more of just trying it to see if I can.
Celestron 8SE Dobstuff 13.1": Swayze refigured Coulter mirror, 6 pt mirror cell (2 pt edge support) and CF focuser board made by me StarBlast 4.5 ST80/PortaMount II Zhumell 20x80/Oberwerk 15x70 on a Seronik-style tripod boom mount Hubble Optics 18 inch F/4 mirror.
Quote:I can do up to 18" diameter and whatever thickness I want in mine.
Quote:Quote:...It's more of just trying it to see if I can. How about experimenting with the process by spin-casting urethane casting resin? Then check it out with a Foucault tester.
Ex Oriente, astrum ---------------------- From the day you are born 'til you ride in a hearse, There's nothing so bad that it couldn't be worse!
8" Criterion Dynamax 6" Homebuilt F/10 Newt 6" F/8 Jaegers 127mm F/5.5 SS Assembly Various 60 mm scopes in many states of repair 8' Dome Observitory
Quote:Where did you get the mercury from?
10"f5.3 Newt (homemade) 8"f6 (hm)8"f7.5 (M Harry mirror) 6" f8 Newt (hm) 2 4.25"f11 Edmund newts. 4.25" Schief (hm) 5" D&G Refractor 5"Celestron MakCass, 6" MakNewt Intes optics,6" f10 MakCass Intes optics several small refractors 90mm, 80mm, 60mm