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 >> Eyepieces Previous   Index   Next   Threaded   Pages: 1 escaner member Reged: 09/25/07 Posts: 22 Loc: Barcelona, Spain Cap for Celestron Ultima       #2647714 - 09/17/08 02:03 PM Edit   Reply   Quote Quick Reply   Hello I have acquired an old Celestron Ultima 12.5mm without caps. Anyone knows the diameter needed for the upper one? Many caps have it printed in their inner side. Thanks a lot! Óscar Post Extras:       JimK member Reged: 09/18/05 Posts: 93 Loc: Albuquerque, NM USA Re: Cap for Celestron Ultima [Re: escaner]       #2648519 - 09/17/08 09:37 PM Edit   Reply   Quote Quick Reply   My Celestron 12.5mm eyepiece upper cap has the number 355 on its inside. Post Extras:       escaner member Reged: 09/25/07 Posts: 22 Loc: Barcelona, Spain Re: Cap for Celestron Ultima [Re: JimK]       #2649030 - 09/18/08 04:28 AM Edit   Reply   Quote Quick Reply   That should be 35.5mm. Thank you, Jim Post Extras:       WRose Pooh-Bah Reged: 07/08/05 Posts: 1050 Loc: Colorado, USA Re: Cap for Celestron Ultima [Re: escaner]       #2649404 - 09/18/08 10:49 AM Edit   Reply   Quote Quick Reply   I can confirm that my Celestron Ultimas have a 35.5mm Cap also. I tried a 36mm replacement cap and it's a bit loose. Works OK but falls off if the EP is turned upside down and bumped. A 35mm replacement cap can be force fit on the EP but I'd suggest you lighly trim any ribs inside of the cap before forcing it on the EP. -------------------- Clear Skies, Bill Post Extras:       EdZ Professor EdZ Reged: 02/15/02 Posts: 12592 Loc: Cumberland, R I , USA42N71.4W Re: Cap for Celestron Ultima [Re: WRose]       #2649418 - 09/18/08 11:03 AM Edit   Reply   Quote Quick Reply   from a post on this same topic a few months ago End Caps for Eyepieces 05/06/08 09:41 AM Agena Astro. http://www.agenaastro.com/End-caps-p/paec-mi-ec.htm Along with Orion and Scopestuff, these are my three sources for caps, and I can usually find the size I need from one of them. Orion whacks you the most for shipping. Scopestuff has the clear 31.7mm bottom caps and had some clear top caps, but I don't see the clear tops anymore. the 1/4" shallow black bottom caps aren't worth it. they do not stay on. Get the deep bottoms. I needed quite a few TV top caps and found 36.5mm fits over the extended rubber eyeguard. (Orion) Couldn't for the life of me find the right black caps to cover all my bought used Ultimas. Found the Agena yellow 35.5 top cap works perfectly for the 12.5 and 18 Ultimas. Found that the Orion 38mm black top cap fits over the Tak LEs perfectly. Bought a bag of caps once from a seller on Astromart. They were like chair leg caps. The bottom caps did not fit. You could push them on, but you would really struggle to get them off. Bottom caps with rounded profile were a real pain in the butt. Have since thrown most of those away. edz -------------------- Teach a kid something today. The feeling you'll get is one of life's greatest rewards. member#21 Post Extras:       escaner member Reged: 09/25/07 Posts: 22 Loc: Barcelona, Spain Re: Cap for Celestron Ultima [Re: EdZ]       #2652924 - 09/20/08 05:23 AM Edit   Reply   Quote Quick Reply   Thank's a lot! I have added them to my next order to Agena. PS: Sorry for not searching berfore asking. I didn't think that a so specific question was already answered! Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 4 registered and 6 anonymous users are browsing this forum. Moderator:  Greg K., Jason B, csa/montana  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 126 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