Happy owner of--
A Mag 1, 12.5 inch Porta Ball
A Dual Axis Equatorial Platform
A PST Double Stack
Quote:Comparing Orion UK, Discovery and Zambuto is like comparing BMW, Benz and Bugatti. BMW and Benz are excellent cars that most people will be very happy with, but they simply are not at the same performance (or price) level as a Bugatti. The remaining question is whether Orion UK or Discovery is better. I don't have a Discovery to compare to, and I have to admit my initial reaction is one of hesitation based on both having good reputations. What I do know is that you will get an Orion UK a heck of a lot faster than a Discovery (assuming you are buying a new, custom order). Mine took no more than six weeks including shipping from Europe.
-Tristan Schwartz- Former Resident Astro-Guru, Arizona Museum of Natural History
Member of Colorado Springs Astronomical Society Look for my article "Making the Case for Structured Observing," coming to Sky & Telescope in 2014!
6" Orion DSE Dob, Coronado PST
Calypte Anza, California
Quote:If anything is worth a long waiting list, it's a Zambuto.
12.5" Home built F-4.8 Eq Newt. Lightholder Optics mirror 12'x12' roll-off roof observatory 6" Home built f-6 Newt. w/Dick Wessling mirror on CG-5 Eq. mount. 4.5" Orion Starblast My equipment philosophy... If it ain't broke, fix it anyway.
Quote:WRT Discovery: They were pushing out a lot of scopes at one time, and individual mirrors weren't fussed over as (I assume) Zambuto does with one mirror for one customer. Terry O. is a personal friend of mine and near-neighbor (walking distance), so anything I say must be judged in that light. We've often chatted about the mirrors he did for discovery, in light of frequent comments in this forum. He still thinks most of them were pretty good, but he's learned a lot about testing since those days, as has (probably) Carl Zambuto, so I'm not surprised that Carl's mirrors might be better than average production Discovery mirrors...
18" f/4.2 homebuilt truss 12.5" f/6 hybrid tube dob
Quote:I guess Terry wasn't always as consistent.
AS of NSW
AS of Hunter Valley
Fact: I like reflectors and big ones. All the refractors I own are either finderscopes, binoculars, or riflescopes.
18"/F4.5 Obsession #1333 fully optioned (OMI Optics)
14"/F4.5 SDM #33 fully optioned (Zambuto Optics)
10"/F5.3 SDM #50 fully optioned (Suchting Optics)
Pentax XW's, T4 & T5 Naglers , UO HD orthos, 6mm Delos, 8mm Radian, 8.5mm Pentax XF, 13mm Ethos. 12mm Celestron Illum Astrometric eyepiece. Rainbow Optics Spectroscopic Eyepiece Set. Orion Optics UK 250 lpi Ronchi grating eyepiece. 2" Astronomiks UHC, OIII & H-Beta filters, 2" DGM Optics NPB filter. 2" Variable Polariser. 2" Hoya colour filters.
Leupold 10x42 & Pentax 16x60 binos.
Quote:I have owned mirrors from almost all well known mirror makers over the past 30 years -- and Lockwood and Zambuto are the only ones I'll ever buy from again.
Quote: I recently saw a picture somewhere of another optician's shop -- don't ask whose, because I really don't remember, but it wasn't anyone discussed in this thread -- and what I saw in the picture looked like a grit-soaked hellhole.
20" homebuilt truss dob 6" watson refractor
Quote:... and comparing it to more current Synta / GSO mirrors is like comparing a Porsche to a Honda.
Quote:Quote: I recently saw a picture somewhere of another optician's shop -- don't ask whose, because I really don't remember, but it wasn't anyone discussed in this thread -- and what I saw in the picture looked like a grit-soaked hellhole. Quite likely mine (although I'm not a professional). If so, looks can be deceiving. Dave
Home made 16" f5 Terry Ostahowski optics - ArgoNavis/ServoCAT
ES 30 mm, Ethos 21, 13 and 10 mm, Paracorr II, Antares Barlow 2" 1.6X
2" DGM NPB filter
2" Catseye Cheshire/Sight tube - 2" Howie Glatter laser + Tublug
Quote:Quote:... and comparing it to more current Synta / GSO mirrors is like comparing a Porsche to a Honda.Kind of unfair to Honda which are reliably consistent.
"I have been paddling in the shallows of a great ocean of knowledge." - Sir Isaac Newton * * 15" F4.55 Starsplitter Dob & a Denk II binoviewer * * http://peaceofsky.wordpress.com/ Pacheco State Park Fremont Peak
Quote:I cannot tell the difference with the ZOC on feint stars or nebulae. Believe me I dont want this to be true after the money I spent, but it does seem to be true for me. I suppose that an experienced observer under perfect skies, on a scope with a perfect secondary mirror, will notice that the ZOC mirror is superior, who knows.... So I dont think you can generalise and say brand X is "better" than brand Y, unless if there is proper evidence to support that contention.
My eyepieces are made from the waste product of exploding stars.
10XTi 102XLT ST80A(2" Focuser); President, Eypieces Anonymous, Denver Chapter (Hello, I'm an eyepiece junky, what's your excuse?)
DAS Dark Site
Quote:Sometimes you get lucky. I did
XT10 classic with premium optics Tri-knob CR2 focuser
Catseye + Glatter collimation tools
StarBlast 4.5" & 6"
Round Table Platform
Quote:Nah, only test has been eyeball to eyepiece. It just luckily has a nice mirror. I do keep it collimated though, and that might make a difference from comparisons to others scopes....
Quote:Resale value is strongly in favor of the Zambuto. It just one factor in the equation, but so far in favor of the Zambuto it drastically tips this scale in its' favor.
Quote:Quote:Nah, only test has been eyeball to eyepiece. It just luckily has a nice mirror. I do keep it collimated though, and that might make a difference from comparisons to others scopes.... My original stock XT10 mirror gave nice views and I was happy with it and I would still be happy with it if I am still using it today; however, when I upgraded my mirror to Ed Steven's mirror years ago I noticed the difference to be subtle at low and mid magnification but more prevalent at higher magnification. Interestingly, the star test of both mirrors is far apart. My Steven’s mirror gave very nice defocused star images at both ends of the focus but my stock mirror showed a clear case of spherical aberration. As I stated in older posts, my experience made me have more respect for mass produced mirrors and more appreciation for premium mirrors.Jason
15" f/5 Tectron
Mallincam Junior Pro
TMB 40mm Paragon,Leica ASPH zoom,
WO binoviewer w/assorted pairs
"Yeah, well, you know,that's just, like, your opinion, man."
I would have to disagree with this point. Yes, resale value is with the Zambuto but by how big of a factor. If the 10" GSO mirror (under $200) will sell for 70% ($140) of cost and the 10" Zambuto mirror ($1400) will sell for 80% ($980) of cost but the price difference is too large you will still loose more money (GSO $60, Zambuty $420) on the Zambuty than the GSO. Besides, people who buy anything other than traditionally appreciating products (stocks, bonds, commodities, etc...) based on resale value would be far better off sticking their money in the bank. Something like a Telescope Primary is something you buy for your use, not because you want to resale it later.
Quote:Let me know your opinion!
You know you are there when you start thinking in terms of EXIT PUPIL rather than Magnification..
Quote:Hellouse for 1 month a mirroir 17 "5 F/D 4 Zerodur Ostahowsky optic, and since I make of the astronomy ( 35 years) it is certainly the best optics through which I observed!!!In visual in December I was able to observe details of all the satellites jupiter in 900X, it was extraordinary!!! No light diffusion, What proves a roughness of the optical surface very low;Fabulous!!!Terry possesses a workshop and a excellent interferometric banns testsome picture of mi new scope : http://jp-brahic.chez-alice.fr/t450.htmjp
Home-built Dob 10 F6/Zambuto/Osypowski Platform Starmaster 7 Oak Classic- Zambuto Discmount DM-4 w encoders Stellarvue 80ED Stellarvue 70ED Stellarvue 60 Finder Tasco 50 refractor (1966 birthday gift) Orion 80ST Lunt 60 Double Stack Bogen with Dwarfstar mount AT Voyager mount Celestron SLT mount Astro Physics 15x70 Binos Orion Parallelogram mount