|
|
|||||
|
Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place... The Space and Astronomy Agora |
RE: Measuring Focal Length
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by Rick Crockett on May 27, 2000 05:30:43 UTC |
Build a small open faced box for the mirror to sit in. Attach a 2x2 post to the side sticking up from the open box. Make a cardboard slide that can be moved up and down the post and extends past the center of the mirror. Put the mirror in the box, point it toward the moon and move the slide until the moon is in focus. Tape the slide in place and measure the distance from slide to mirror.
|
|
Additional Information |
---|
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 |