Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> ATM, Optics and DIY Forum Previous   Index   Next   Threaded   Pages: 1 Crazy Canadian member Reged: 01/30/08 Posts: 16 Loc: Saskatchewan Pyrex 1.00 m/a secondary?       #2675413 - 10/02/08 12:54 AM Edit   Reply   Quote Quick Reply   Hi everyone, For my project I need a pyrex 1.00" m/a secondary, but my web surfing has turned up no one who produces this (I've found pyrex 1.3, plate glass 1.1 and quartz 1.00)...does anyone know of a company who sells/or customs this size of pyrex secondary? thanks to all who reply Post Extras:       dave b Carpal Tunnel Reged: 05/10/05 Posts: 2460 Re: Pyrex 1.00 m/a secondary? [Re: Crazy Canadian]       #2675421 - 10/02/08 01:10 AM Edit   Reply   Quote Quick Reply   the quartz would be a higher quality substrate than the pyrex, so i would just get the quartz -------------------- dave bonandrini 30" f/5.2 Dobsonian President of GCAC Astromart Moderator Post Extras:       Crazy Canadian member Reged: 01/30/08 Posts: 16 Loc: Saskatchewan Re: Pyrex 1.00 m/a secondary? [Re: dave b]       #2676776 - 10/02/08 05:40 PM Edit   Reply   Quote Quick Reply   Hi Dave, Yes I agree the quartz is better, but the reasoning behind wanting Pyrex is that my project is more of a restoration project than an ATM one and the person I am doing it for wants the old scope the way he remembers it, with as close to "original" as can be, hence the pyrex. Its a sentimental thing. Post Extras:       dave b Carpal Tunnel Reged: 05/10/05 Posts: 2460 Re: Pyrex 1.00 m/a secondary? [Re: Crazy Canadian]       #2677433 - 10/03/08 12:45 AM Edit   Reply   Quote Quick Reply   do you think he will see a difference looking at the quartz in daylight? keep an eye on http://surplusshed.com/ in the flats department. -------------------- dave bonandrini 30" f/5.2 Dobsonian President of GCAC Astromart Moderator Post Extras:       mark cowan Vendor (Obsidian Optics) Reged: 06/03/05 Posts: 1370 Loc: salem, OR Re: Pyrex 1.00 m/a secondary? [Re: dave b]       #2680712 - 10/05/08 12:02 AM Edit   Reply   Quote Quick Reply   http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productid=1729 Edmunds sells a 1.062" 1/8 wave surface Pyrex secondary here, US made. It might even be the same item! Best, Mark Post Extras:       Gregg Lobdell sage Reged: 01/20/06 Posts: 373 Loc: Covington, WA Re: Pyrex 1.00 m/a secondary? [Re: mark cowan]       #2685678 - 10/07/08 04:14 PM Edit   Reply   Quote Quick Reply   Newport Glass shows a 1" pyrex diagonal, part # PQDX100 or PTDX100 (1/4 or 1/10 wave) see: http://newportglass.com/angwcat.htm section 13 -------------------- Clear skies, Gregg Post Extras:       Crazy Canadian member Reged: 01/30/08 Posts: 16 Loc: Saskatchewan Re: Pyrex 1.00 m/a secondary? [Re: Gregg Lobdell]       #2685800 - 10/07/08 05:15 PM Edit   Reply   Quote Quick Reply   Dave, Mark, & Greg Thank you guys so much for the links!!! I think I found what I am looking for with edmund optics secondary!! Once again I appreciate the help!! Tex Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 7 registered and 2 anonymous users are browsing this forum. Moderator:  Don W, Joe Cipriano  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 261 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   General Observing   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Other* -----   Science of Astronomy & Space exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements Home

Cloudy Nights Sponsor: Astronomics