· 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 You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar CN Feedback and Vendor Announcements >> Vendor and Group Announcements Previous   Index   Next   Threaded   Pages: 1 AG Optical Vendor -AG Optical Reged: 09/09/10 Loc: Alabama AG Optical Systems - quartz optics now available       #5653868 - 01/31/13 09:10 AM Edit   Reply   Quote Quick Reply   AG Optical Systems is excited to offer a quartz upgrade option on all of our telescope offerings. Quartz' extremely low coefficient of thermal expansion greatly improves a mirror's ability to resist changes in its figure as ambient temperatures change. The end result is that you can spend more time imaging and less time waiting for the scope to cool. We are offering special quartz upgrade pricing for a limited time: $600 for a 12.5" iDK and $1000 for a 17" iDK. Please visit the AG Optical Systems website to learn more. Thanks! Dave Tandy Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 8 registered and 11 anonymous users are browsing this forum. Moderator:  BRisley, bilgebay  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 339 Jump to *Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Celestial Events*General Astronomy* -----   Beginners Forum   General Observing and Astronomy   Outreach   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning and Intermediate Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   NEO   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*Speciality Forums* -----   Arizona Science and Astronomy Expo   NEAF (Northeast Astronomy Forum) and NEAIC (Northeast Astro Imaging Conference)   AstroArt   Astronomy Clubs and Star Parties   Astronomy Software & Computers   AstroWebsites   Science! Astronomy & Space Exploration, and Others   Space Rocks   Stellar Media*Swap and Shop* -----   Shop and Swap Audio Components*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements*International Year of Astronomy 2009 - Forums are now closed.* -----   IYA Archive Info CN Forums Home

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