RougeThunder
member
Reged: 03/18/08
Posts: 18
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I'm looking to make my first telescope. I have choosen a 8" f6 dob, but I'm not finding the variaty of suppliers I'd like. ATMer's, can you give me a few suppliers of pyrex mirror blanks in the U.S.? Any other info would be greatly appriciated, but isn't nessicary,
Thanks for your help and knowledge!
Matt 
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tim53
sage
Reged: 12/17/04
Posts: 323
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A good first place to look would be on the telescope making pages at stellafane.org.
-Tim.
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"We`re just waiting looking skyward as the days come down.
Someone promised there`d be answers, if we stayed around."
-Orchestral Maneuvers in the Dark, "The Romance of the Telescope"
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randtek
professor emeritus
Reged: 06/18/05
Posts: 694
Loc: Central Indiana
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Newport Glass has kits that include pretty much everything needed for grinding and polishing. Aluminum coating is included in the price. You can view the kits here:
Newport Glass Mirror Kits
They list blanks * here * but no prices are listed for the blanks. I guess you would have to call.
GotGrit has blanks, but they only list the 8" in plate, not pyrex.
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Randy
"The reasonable man adapts himself to the world; the unreasonable man persists in trying to adapt the world to himself.
Therefore all progress depends on the unreasonable man."
George Bernard Shaw
SkyQuest XT10
Homebuilt Surplus Shed 102mm f8.8 refractor (still under construction-OTA done, mount in work)
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grinder65
journeyman
Reged: 12/04/07
Posts: 38
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See Reco Labs on ebay, Excellent
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ken scharf
sage
Reged: 02/09/08
Posts: 393
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Quote:
See Reco Labs on ebay, Excellent
His blanks are quartz not pyrex. Nothing wrong with quartz, but it is different to work with than pyrex. He will pre-generate a curve for you if you want. You don't have to buy from his ebay store, email him and he will sell direct (maybe at a better price!)
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Mitchell
member
Reged: 05/19/08
Posts: 82
Loc: USA
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Currently he has no products but a diamond stone listed. 
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Clear Skies and Good Health, Mitchell.
ATM:
4.5" F/3.75 ~ 6" F/6.5 ~ 8" F/8.25 (Polishing) ~ 10" F/4.8
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ken scharf
sage
Reged: 02/09/08
Posts: 393
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Quote:
Currently he has no products but a diamond stone listed.
Contact him via his website, not the ebay store.
http://www.recolabs.com/
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kfrederick
sage
Reged: 02/01/08
Posts: 223
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are you making a mirror to learn optics or you making a mirror to have a telescope . if all you wont is a telescope by one you will save money and alot of time /if you wont to learn mirror making and have alot of fun with a cool hobby that you can learn a for lifetime then go for it.
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grinder65
journeyman
Reged: 12/04/07
Posts: 38
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Yes, Reco Labs blanks take a little longer to grind and polish but they are well worth the effort. I currently have finished 3 and all are excellent, under calm skies i can push them to 500x easily, I have a 14.75" f 3.9, a 13.5" f4.1 and a 14.75" f 5.3
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RougeThunder
member
Reged: 03/18/08
Posts: 18
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Hey, thanks you guys! I want to make an 8" dob so I can gain expierience to someday grind refractor lenses. The later being often extremely difficult and time consuming, everything I've read says mirrors first. Unfortunately, this is my first mirror and quartz is apparently trickier to grind and figure than pyrex, so pyrex is the way I'm going. I'm probably going to go with a blank from newport glass! Thanks you guys!
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