· 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 Equipment Discussions >> ATM, Optics and DIY Forum Previous   Index   Next   Threaded   Pages: 1 danjones member Reged: 09/26/12 home built spherometer       #5607600 - 01/06/13 12:11 AM Attachment (50 downloads) Edit   Reply   Quote Quick Reply   this is my home built spherometer. thanks youtube uploaders; to 'carluchoparis' for the construction, and gordon waite for the mathmatics. building was a snap. calibrating and getting the math done...took careful time to ensure it was right, but done. so far, it seems to work great. i can use gordon's formula after grinds to calculate the fl and roc. i was surprised at how much 0.001 of an inch could change the roc. in the pic, it's up on some items. at this point, i just glued on the ball feet and needed it elevated so that the gauge pin didnt bottom out, to be safe. Post Extras:       StarDusty sage Reged: 10/02/07 Loc: Parsippany, NJ Re: home built spherometer [Re: danjones]       #5608534 - 01/06/13 02:33 PM Edit   Reply   Quote Quick Reply   Nice... Post Extras:       MKV Carpal Tunnel Reged: 01/20/11 Re: home built spherometer [Re: danjones]       #5608611 - 01/06/13 03:08 PM Attachment (18 downloads) Edit   Reply   Quote Quick Reply   Dan, I made mine of two 1/4 inch by 1 inch aluminum bar stock to avoid any flexure. Mladen Post Extras:       danjones member Reged: 09/26/12 Re: home built spherometer [Re: MKV]       #5616453 - 01/10/13 11:00 PM Edit   Reply   Quote Quick Reply   i like mike's site of loptics.com. those are some huge mirrors. thanks for sharing. Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 19 registered and 20 anonymous users are browsing this forum. Moderator:  ausastronomer, richard7  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 529 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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