Back to Home

ATM Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Amateur Telescope Making | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Help!!! Focusing Problem

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Jim Adkins/">Jim Adkins on February 23, 2000 04:44:20 UTC

: I just built my first telescope and I'm having a focusing problem. : The telescope will focus on something about 20 feet away but won't : focus on anything further than that. It has a 6" f/5 : mirror, 1.3" secondary. The tube is 8" diameter. The mirrors : are spaced 24" apart. The focuser is Orion's cheapee : for the 1.25" eyepieces. What did I do wrong? Any help will : be very much appreciated.

Your eyepiece is too far from the secondary mirror - perhaps the focuser you referred to is higher than the scope was designed for. The answer may be to get a short helical focuser that is not as tall as a rack and pinion.

Follow Ups:

    Login to Post
    Additional Information
    Google
     
    Web www.astronomy.net
    DayNightLine
    About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
    Unless otherwise specified, web site content Copyright 1994-2022 John Huggins All Rights Reserved
    Forum posts are Copyright their authors as specified in the heading above the post.
    "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
    are trademarks of John Huggins