Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Reflectors

Pages: 1
dscarpa
Post Laureate
*****

Reged: 03/15/08

Loc: San Diego Ca.
Pyrex vs borosilicate glass.
      #5650049 - 01/29/13 10:59 AM

I was just reading the email Rob Teeter sent me reguarding the 11" F/5 Zambuto is making for me. He will be using his last 11" Pyrex blank. I didn't realize this when Rob called me and said Zambuto had a blank he could use for my mirror. The new blanks are made with Schott Supermax borosilicate glass. It would mean waiting 6 months more to get my scope with the new glass but I would gladly do it if it made for a better mirror. David

Edited by dscarpa (01/29/13 11:09 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Jason D
Postmaster
*****

Reged: 10/21/06

Loc: California
Re: Pyrex vs borosilicate glass. new [Re: dscarpa]
      #5650060 - 01/29/13 11:03 AM

They are the same

http://en.wikipedia.org/wiki/Borosilicate_glass

Borosilicate is the glass type
Pyrex is a trademark


Post Extras: Print Post   Remind Me!   Notify Moderator  
dscarpa
Post Laureate
*****

Reged: 03/15/08

Loc: San Diego Ca.
Re: Pyrex vs borosilicate glass. new [Re: dscarpa]
      #5650071 - 01/29/13 11:12 AM

Thanks for the info! That's a relief. David

Post Extras: Print Post   Remind Me!   Notify Moderator  
Achernar
Postmaster
*****

Reged: 02/25/06

Loc: Mobile, Alabama, USA
Re: Pyrex vs borosilicate glass. new [Re: dscarpa]
      #5650136 - 01/29/13 11:48 AM

They are the same kind of glass, which contains boron, hence the term borosilicate. All glass is mostly made of silica or silicon dioxide, it's the presence of other elements in it that determines it's optical and mechanical properties. Supermax will work just as well as Pyrex will for a mirror.

Taras


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mr. Marbles
professor emeritus


Reged: 04/23/05

Loc: Saratoga Springs, NY
Re: Pyrex vs borosilicate glass. new [Re: Achernar]
      #5650346 - 01/29/13 01:42 PM

Have no worries, Carl would never let anything leave his shop that did not meet his optical standards. He wouldn't use any material that'd perform less than perfectly.

Post Extras: Print Post   Remind Me!   Notify Moderator  
John Kuhl
sage


Reged: 11/10/05

Loc: SoCal
Re: Pyrex vs borosilicate glass. new [Re: Mr. Marbles]
      #5650774 - 01/29/13 05:16 PM


Yes they are the same, but what is the thickness of each one? If it was me I would get the thinner one of the two, and is there a price difference? Just a couple of things to consider.

Best, John


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
19 registered and 17 anonymous users are browsing this forum.

Moderator:  ausastronomer, Phillip Creed, JayinUT, okieav8r 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 873

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics