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
Mirror Box Height

Forum List | Follow Ups | Post Message | Back to Thread Topics
Posted by Doug Tanaka on May 15, 2000 16:01:25 UTC

I`m planning on making a 12.5" truss tube Newtonian, with a restriction that the mirror box cannot be more than 12.25" tall so it can be stowed underneath the bed in our van ( my wife`s specifications; if up to me it might ride on the front seat). I am torn between the optical quality of an f6 and the lower balance point of an f5.6. I`m pretty sure I can fit a balanced unit under the 12.25", but I`m afraid the extra 5" in length when I go to f6 will force me to add a lot of weight to the mirror box (which I don`t want to do because I move the scope up and down two flights of stairs). I`m also hoping to make it a split-ring mounted, so I suppose the balance point could be moved up the trusses, but I`m afraid it would cause collimation problems. Any advice would be appreciated.

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 1994-2020 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