· 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 >> ATM, Optics and DIY Forum Previous   Index   Next   Threaded   Pages: 1 derangedhermit sage Reged: 10/07/09 Loc: D/FW, TX Is a two-stage focuser needed for an f/5 scope?       #5536783 - 11/24/12 08:22 AM Edit   Reply   Quote Quick Reply   Assume old eyeballs, if that makes a difference. I have a JMI that I can upgrade to a two-stage focuser (at considerable cost). I'm wondering if it is worthwhile. Visual use only, on a Dobsonian. Post Extras:       kfrederick Carpal Tunnel Reged: 02/01/08 Re: Is a two-stage focuser needed for an f/5 scope? [Re: derangedhermit]       #5536801 - 11/24/12 08:39 AM Edit   Reply   Quote Quick Reply   A bigger knob helps . Post Extras:       Ed D Carpal Tunnel Reged: 04/30/10 Loc: Sunny South Florida Re: Is a two-stage focuser needed for an f/5 scope? [Re: kfrederick]       #5536844 - 11/24/12 09:05 AM Edit   Reply   Quote Quick Reply   Not if observing at lower magnifications. However, if you want to get really fine focus at high magnification, such as when observing planets, then it really is nice to have, especially for older eyes. I also use big focus knobs on my f/8 Dob and it does help. Small knobs are a PITA no matter what the scope speed or type of focuser. Ed D Post Extras:       operascope sage Reged: 09/03/08 Loc: Canada Re: Is a two-stage focuser needed for an f/5 scope? [Re: Ed D]       #5537162 - 11/24/12 12:16 PM Edit   Reply   Quote Quick Reply   A cheaper option might be to use a helical fine focuser. However, I like 2 stage for all my scopes. Even makes my f/9.4 better. Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 12 registered and 21 anonymous users are browsing this forum. Moderator:  ausastronomer, richard7  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 271 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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