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   Brooklyn scholastic sledgehammer Reged: 07/24/08 Posts: 870 Loc: Central New Jersey Re: Trying to "modify" baader hyperions, help!       08/06/08 05:42 PM Edit   Reply   Quote   Quick Reply:   sorry about that lawrence S., i really should have made it a clearer expression. I meant to respond to the quote: "The 28mm FTR made the 17mm into a straw. The eye relief wasn't too bad but the FOV suffered." But yea you're dead on, straw eyepieces come from smaller fov. Heres a new question which has arisen from the previous... People have said that their eye relief and FOV suffers when using these FTRs to decrease the focal length. If the FOV gets smaller why does the table (linked in original post) show that the field stops are actually larger for a 8mm modded into a 5mm, than a retail 5mm non modded? Taken from the chart mentioned previously, 8mm = 10.7mm field stop, an 8mm w/ FTR modded into a 5mm has a 7.1mm field stop. 5mm = 6.5mm field stop So.....5mm retail = 6.5mm field stop VS a 7.1mm field stop in the modded 8mm to 5mm. Is the field stop directly related to FOV? if so wouldnt this mean that the modded 8mm has a bigger fov than a 5mm? -------------------- Meade 8.25"(209.55mm) LX-90 EMC (SCT) Albert Einstein => “Intellectual growth should commence at birth and cease only at death.” “If you can't explain it simply, you don't understand it well enough.” 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 17 registered and 15 anonymous users are browsing this forum. 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