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   Flat   BillP Carpal Tunnel Reged: 11/26/06 Posts: 2212 Loc: Vienna, VA Re: Trying to "modify" baader hyperions, help!       08/07/08 05:01 PM Edit   Reply   Quote   Quick Reply:   No. It's better corrected off-axis without those elements. Quite unexpected. So if all you do is remove the Smyth group in the chrome barrel the edge is quite horrible with the 5mm. Much better when you remove the others as well so you are only left with a 4-element design. Throughput is noticably better as well given 2 doublets just got removed -- not that it was bad to begin with. Again, it's no Nagler (although I lovingly call it my 26H5), but much better correction than simply removing the Smyths IMO. FYI, I've done this also with the 17mm, and I recall it is not bad either. However, unlike the 5mm, for some reason the elements in the upper housing iof the 17mm are not held in by a retaining ring but instead using the barrel housing to do this. So once you break the light glue seal they use to unscrew the 2" housing (at the joint where the rubber grip is), the elements will fall to the floor if you are not careful with the 17mm. I guess you can figure how I know that huh -------------------- 250mm f/4.7 Orion XT10i Dobsonian 102mm f/8.0 Tak TSA Super-APO 66mm f/5.9 WO ZenithStar SD APO 40mm f/10 Coronado P.S.T. Post Extras       Entire thread Subject Posted by Posted on Trying to "modify" baader hyperions, help! Brooklyn 08/06/08 01:23 AM Re: Trying to "modify" baader hyperions, help! BillP   08/06/08 06:29 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/06/08 06:42 PM Re: Trying to "modify" baader hyperions, help! BillP   08/06/08 10:06 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/06/08 11:10 PM Re: Trying to "modify" baader hyperions, help! BillP   08/06/08 11:32 PM Re: Trying to "modify" baader hyperions, help! Phillip Creed   08/07/08 09:10 AM Re: Trying to "modify" baader hyperions, help! Gaz O'C   08/08/08 12:33 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/08/08 07:05 PM Re: Trying to "modify" baader hyperions, help! BillP   08/07/08 05:01 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/07/08 06:39 PM Re: Trying to "modify" baader hyperions, help! BillP   08/07/08 09:37 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/08/08 01:28 AM Re: Trying to "modify" baader hyperions, help! Lawrence Sayre   08/06/08 06:47 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/06/08 07:08 PM Re: Trying to "modify" baader hyperions, help! Lawrence Sayre   08/06/08 07:26 PM Re: Trying to "modify" baader hyperions, help! NGC6144   08/06/08 06:59 PM Re: Trying to "modify" baader hyperions, help! Lawrence Sayre   08/06/08 07:21 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/06/08 01:39 AM Re: Trying to "modify" baader hyperions, help! Wobrak   08/06/08 06:47 AM Re: Trying to "modify" baader hyperions, help! DSalters   08/06/08 01:41 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/06/08 01:53 PM Re: Trying to "modify" baader hyperions, help! Lawrence Sayre   08/06/08 04:43 PM Re: Trying to "modify" baader hyperions, help! Brooklyn   08/06/08 05:42 PM Re: Trying to "modify" baader hyperions, help! Lawrence Sayre   08/06/08 05:48 PM Re: Trying to "modify" baader hyperions, help! Lawrence Sayre   08/06/08 01:40 PM Extra information 5 registered and 10 anonymous users are browsing this forum. 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