· 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 >> Eyepieces Previous   Index   Next   Threaded   Pages: 1 Dubreuil member Reged: 09/30/07 Loc: Whitby, Ontario, Canada Skywatcher LET 2" 28mm???       #5353433 - 08/05/12 04:32 PM Attachment (19 downloads) Edit   Reply   Quote Quick Reply   This eye piece came with my telescope and I am trying to find out more information about it. I am trying to find out the AFOV of this eye piece. Would anybody know what the AFOV is on the Skywatcher LET 2" 28mm? http://ca.skywatcher.com/_english/03_accessories/02_detail.php?sid=161 If it is greater than 50 degrees then I do not see the need to get a 32mm Plossl Thanks, Post Extras:       Jim Nelson scholastic sledgehammer Reged: 05/10/05 Loc: SE Michigan Re: Skywatcher LET 2" 28mm??? [Re: Dubreuil]       #5353480 - 08/05/12 04:56 PM Edit   Reply   Quote Quick Reply   They appear to have a 55 degree AFOV. LINK Post Extras:       Dubreuil member Reged: 09/30/07 Loc: Whitby, Ontario, Canada Re: Skywatcher LET 2" 28mm??? [Re: Jim Nelson]       #5353550 - 08/05/12 05:41 PM Edit   Reply   Quote Quick Reply   Thank you very much. Looks like another eye piece is in my future. Thanks again. Post Extras:       Jon Isaacs Postmaster Reged: 06/16/04 Loc: San Diego and Boulevard, CA Re: Skywatcher LET 2" 28mm??? [Re: Dubreuil]       #5353718 - 08/05/12 08:02 PM Edit   Reply   Quote Quick Reply   According to the link Jim provided, the field stop of the 28mm LET is 31mm, that would mean it should exceed the TFoV of a 1.25 inch 32mm Plossl. The field stop of the Plossl is less than 28mm. You could actually measure the diameter of the field stop. When you look through the eyepiece, you see the edge of the field of view as a dark boundary, that's the field stop. If you turn the eyepiece around and look through it backwards, you should see the field stop as a ring part way down the barrel. If you can measure the diameter of the ring, you can calculate the TFoV. Jon Post Extras:       Michaelo newbie Reged: 12/21/12 Re: Skywatcher LET 2" 28mm??? [Re: Jon Isaacs]       #5617434 - 01/11/13 03:07 PM Edit   Reply   Quote Quick Reply   What exactly is a LET eyepiece and how do they differ from normal eyepieces? Edited by Michaelo (01/11/13 03:56 PM) Post Extras:       denis0007dl sage Reged: 04/17/12 Re: Skywatcher LET 2" 28mm??? [Re: Michaelo]       #5617589 - 01/11/13 04:57 PM Edit   Reply   Quote Quick Reply   It is a Kellner with 3 elements, he is good for f/10 scopes and slower, but in fast scopes, like f/5, not good at corrners! Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 23 registered and 30 anonymous users are browsing this forum. Moderator:  ausastronomer, Scott in NC, iceblaze  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 728 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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