Back to Home

Astrophotography 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 | Astrophotography | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
RE: RE: Focal Length

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Steve Henderson on October 6, 2000 19:22:37 UTC

For anyone else who may read this, another option on a truss type Dob is to shorten the poles. This would also move the focal point - similar to moving the mirror up or the secondary / focuser back. This one and the last option are rather permanent modifications. ie: trimmed poles cannot be re-extended later.. (measure once, cut twice!)

I`m going with moving the mirror because I can always put it back where it was. So if someday I upgrade focusers or whathaveyou, I have more flexibility in terms of easy restoration or re-modification. Just some thoughts...

Doing it this weekend - will advise how it goes / results I get. Thanks again Kip for the train of thought...

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 1994-2019 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