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
FOCAL LENGTH

Forum List | Follow Ups | Post Message | Back to Thread Topics
Posted by Scott on January 16, 2002 06:06:35 UTC

Can someone explain how to determine where to cut the focuser hole in my 10" dDobsonian? I have a 10" F5 primary and 2.5" secondary in a 12" tube. I also have a 2" focuser. Do I need to find the actual focal length of the primary? If so, what is the best way. I have been told to use a flashlight and piece of paper. Is there a better way? I would like to do it right the first time. Please be specific as this is my first time building a telescope. Thanks, Scott

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 1994-2024 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