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   Threaded   Pages: 1 charen scholastic sledgehammer Reged: 05/28/05 Posts: 786 Loc: New Zealand Zoom with 2x barlow ?       #1254128 - 11/16/06 03:03 AM Edit   Reply   Quote Quick Reply   Hi! - can you use a Zoom with a x2 barlow ? Have a ED100 with various E.P.s and a Televue x2 barlow - I have Meade 8x24mm Zoom coming which I want to use with children and general use. Do you loose too much light if you also use a barlow ? esp. the ones with built in barlows like my '6mm Ultra wide 66'. Thanks for any information. Edited by charen (11/16/06 03:33 AM) Post Extras:       sixela Postmaster Reged: 12/23/04 Posts: 9499 Loc: Boechout, Belgium Re: Zoom with 2x barlow ? [Re: charen]       #1254132 - 11/16/06 03:09 AM Edit   Reply   Quote Quick Reply   You can use a zoom eyepiece with a barlow. The worst that could happen is some extra vignetting at the longest focal length setting, and some uncomfortable lengthening of the eye relief at that setting, but you're not going to lose light. Anf of course, I doubt that you'll use the zoom at the longest focal length *and* barlow that often; you'll use the barlow for high powered views, i.e. with the zoom set at small focal lengths. -------------------- 400mm f/4.46 David Lukehurst truss Dobsonian on Tom Osypowski equatorial platform Orion Starblast (114mm f/4 reflector, Alt/Az) Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 8 registered and 6 anonymous users are browsing this forum. Moderator:  Greg K., Jason B, csa/montana  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 308 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   General Observing   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*Other* -----   Science of Astronomy & Space exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements Home

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