· 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] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> ATM, Optics and DIY Forum Previous   Index   Next   Flat   Mark Harry Post Laureate Reged: 09/05/05 Posts: 3401 Loc: Northeast Re: No CA, no coma, no image tilt, no obstruction,...       11/03/09 09:26 AM Edit   Reply   Quote   Quick Reply:   I made a concave 6" F/25 with a shorter radius polisher backer,(~112", with used #73 pitch) and the conic came out of polishing roughly -120 for the conic. So making a testplate for that secondary wouldn't be too difficult. You could look for just straight lines if the right deformation was on the testplate. I'd like to know how close to the final deformation that would be needed to work fairly closely to what your plots show above. is -600 to -800 close enough? Mark -------------------- So many projects, so little time! Post Extras       Entire thread Subject Posted by Posted on No CA, no coma, no image tilt, no obstruction,... *DELETED* Ed Jones 11/02/09 12:34 PM Re: No CA, no coma, no image tilt, no obstruction,... Mark Harry   11/04/09 08:06 AM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/04/09 10:08 AM Re: No CA, no coma, no image tilt, no obstruction,... mark cowan   11/04/09 04:05 PM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/04/09 07:04 PM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/04/09 09:06 PM Re: No CA, no coma, no image tilt, no obstruction,... mark cowan   11/04/09 11:46 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/16/09 07:15 AM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/16/09 07:40 AM Re: No CA, no coma, no image tilt, no obstruction,... Mark Harry   11/16/09 07:36 AM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/05/09 05:56 PM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/05/09 06:04 PM Re: No CA, no coma, no image tilt, no obstruction,... Mike I. Jones   11/06/09 08:35 AM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/06/09 09:03 AM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/05/09 05:39 PM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/04/09 07:00 PM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/04/09 10:48 AM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/04/09 10:40 AM Re: No CA, no coma, no image tilt, no obstruction,... Mike I. Jones   11/02/09 10:34 PM Re: No CA, no coma, no image tilt, no obstruction,... Mark Harry   11/03/09 09:35 AM Re: No CA, no coma, no image tilt, no obstruction,... Mark Harry   11/03/09 09:13 AM Re: No CA, no coma, no image tilt, no obstruction,... skyward_eyes   11/02/09 03:28 PM Re: No CA, no coma, no image tilt, no obstruction,... timo4352   11/02/09 01:12 PM Re: No CA, no coma, no image tilt, no obstruction,... RossSackett   11/02/09 02:27 PM Re: No CA, no coma, no image tilt, no obstruction,... *DELETED* Ed Jones   11/02/09 04:58 PM Re: No CA, no coma, no image tilt, no obstruction,... mark cowan   11/02/09 09:59 PM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/03/09 09:13 AM Re: No CA, no coma, no image tilt, no obstruction,... Mark Harry   11/03/09 09:26 AM Re: No CA, no coma, no image tilt, no obstruction,... *DELETED* Ed Jones   11/03/09 09:43 AM Re: No CA, no coma, no image tilt, no obstruction,... Mike I. Jones   11/03/09 10:17 PM Re: No CA, no coma, no image tilt, no obstruction,... Mike I. Jones   11/03/09 10:27 PM Re: No CA, no coma, no image tilt, no obstruction,... Mike I. Jones   11/03/09 10:32 PM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/04/09 10:08 AM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/04/09 07:49 AM Re: No CA, no coma, no image tilt, no obstruction,... Mike I. Jones   11/03/09 02:31 PM Re: No CA, no coma, no image tilt, no obstruction,... mark cowan   11/03/09 04:10 PM Re: No CA, no coma, no image tilt, no obstruction,... RossSackett   11/02/09 05:31 PM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/02/09 06:35 PM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/02/09 02:40 PM Re: No CA, no coma, no image tilt, no obstruction,... Brian Engel   11/02/09 01:00 PM Re: No CA, no coma, no image tilt, no obstruction,... Kobayashi   11/16/09 11:13 AM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/16/09 12:05 PM Re: No CA, no coma, no image tilt, no obstruction,... Kobayashi   11/16/09 12:37 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/16/09 04:34 PM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/16/09 12:14 PM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/16/09 05:42 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/17/09 02:48 AM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/17/09 02:04 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/17/09 04:15 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/17/09 04:47 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/18/09 11:01 AM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/18/09 02:00 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/18/09 04:53 PM Re: No CA, no coma, no image tilt, no obstruction,... marcething   11/19/09 12:37 AM Re: No CA, no coma, no image tilt, no obstruction,... Mark Harry   11/17/09 08:35 AM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/17/09 09:32 AM Re: No CA, no coma, no image tilt, no obstruction,... Ed Jones   11/02/09 02:22 PM Re: No CA, no coma, no image tilt, no obstruction,... kfrederick   11/02/09 12:50 PM Extra information 16 registered and 9 anonymous users are browsing this forum. Moderator:  Don W, Mike I. 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