20 inch f8 Chief Ed Jones designed and a 17 f9 Zanbuto Wide Band Chief Mike Jones designed .Both unobstructed telescopes .
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Quote: Carton mirrors Check these out. Sheldon has loads of good quality stuff and is a great guy to buy from.PM him to see if he has something suitable. Carton stuff is top quailty.
Quote:Astronomy supernewby here, and I have a quick question. Is a Meade 4.5 in. f/4 spherical primary from ebay worth the $24 to by it?
-DannyMy warehouseMy Channel
7x35 and 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, 10" f/11 R30 Istar refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957), 4.25" f/14.8 tasco 20te.http://cleardarksky.com/c/OmahaNEkey.html
20" homebuilt truss dob 6" watson refractor
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:Don't feel bad. I bought one of the f4 mirrors from ebay for project. Now I have a nice paperweight. Live and learn
Nytecam 51N 0.1W Meade 30cm LX200 astrograph+C8+Ha+CaK PSTs+spectrographs SX M9+Lodestar-C+M CCDs/Canon 1100D DSLR My Meade astrograph-colour deepsky My supernova discovery My dome build/spectroscopes/DSO images/Lodestar colour images & videos
Quote:Despite all the good suggestion here, please consider if you are going to build or buy a cell for the mirror. New cells for 4" and 4.25" mirrors are non-existent today. Cells for 4.5" are plentiful, both used and new. If you go with the 4" mirror, you will have to build the cell yourself.
Quote:The main problem with buying used small mirrors are the coatings; it will cost at least twice as much as the used mirror to have it re-coated by the labs.... if they will even do it.
Every week I do something new to reduce light pollution. Eyes on the Sky is at 600,000+ views so far; more views = more awareness. Please consider sharing with others.