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

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: What Is F/10 Mean?

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Tony DeVoe/">Tony DeVoe on March 7, 1998 12:21:52 UTC

: : I'm about to enter the world of amature astronomy and : : buy a new telescope. I'll probably start out in the : : low end of things. I've been looking at Meade's 8" : : LX10. I'm a little confused after looking at all of : : the different telescope specs. What is focal ratio? : : Does a larger focal ratio mean better?

: : Thanks

The f number or is the focal length of the mirror. For example it you purchase a 10" diameter mirror with an F5 focal length, the point at which the light collected by the mirror would be focused would be 50" from the mirror. Check out this web site:

Good seeing

Follow Ups:

Login to Post
Additional Information
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2023 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