``````````````````````````````````````````````````````GrantOrion XT10iPentax 10 X 50 PCF WP II
XT10 classic with premium optics Tri-knob CR2 focuser
Catseye + Glatter collimation tools
StarBlast 4.5" & 6"
Round Table Platform
Ken Fiscus Stargazing since 1980 Now observing from a green zone. Z12 on custom mount, Atomic EQ platform, 100% flocked, OMI primary, Astrocrumb filter slide with O-III, NPB, Skyglow filters. Focuser & spider rotated 45 degrees, new springs & Bob's Knobs, Telrad & 9x50 straight finder 35 & 24 Pans, TV 13,7,5 T6s Custom Orion XT10 with piggyback XT4.5 Round Table EQ Platform
Quote:You have custom made and mass produced made dobs.
Quote:Quote:You have custom made and mass produced made dobs. And what is it about the custom made units that they command such a significant price differential?
Quote:Jason:Your signature refers to an Orion X10? What are the premium optics? Better quality mirror(s)?
Quote: Better design, attention to details, and quality components -- especially optics.
Scopes: 10" dob Antares Optics 1/30 wave secondary/Moonlite CR2, 13.1" home made truss dob Discovery optics, 4" achro (the banger)
Quote:Thanks to everyone who participated in this thread. I will be weighing the options of investing in a 8" or 10" later this year. My budget (nor my wife) will not allow me to invest in a custom scope, but I am getting a better idea on what to look for when comparing different brand name dobs and what improvements to make over time.
Quote:The Teeter STS 8" and 11" dobs are a good example of a custom scope where something similar to the typical mass-produced tube dob structure has been built, but with super quality materials by a master craftsman. Then Rob Teeter offers the buyer the choice of using a typical mass-produced GSO mirror or for a higher price, a custom mirror.
Quote:Wow, looks like Rob has just changed to using mirrors by Alan Raycraft of Antares Optics as standard instead of GSO...
Quote: I'm glad to hear Alan Raycraft is still around. He refigured my 8" Newtonian (Asian) mirror several years ago, as part of my "HPN" scope from the now defunct Anttlers Optics. Shortly after that, his website declared he'd only be doing OEM optics and would no longer be providing consumer services. I was wondering what had become of him.
Quote:...and adjusting the accuracy of the curve in the surface of the mirror...
"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: Quote:...and adjusting the accuracy of the curve in the surface of the mirror... Something like this.Can always be done down the road, years later... as the budget permits.
Quote:So where can one get an entry-level Dob with a mirror that figured properly the first time?
Quote:Quote:So where can one get an entry-level Dob with a mirror that figured properly the first time? Most entry level Dobs have mirrors that are plenty good, good enough that the mirror will rarely be the limiting factor, rather, the limiting factors will be the seeing, the thermal condition of the scope and/or the skill of the observer.Jon