Eyepieces Forum Message | |
| Forums: |
Atm ·
Astrophotography ·
Blackholes ·
Blackholes2 ·
CCD ·
Celestron ·
Domes ·
Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem |
|
|
|
|
||||
|
|
||||||
Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place... The Space and Astronomy Agora |
| Re: More Barlow And 40mm
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by Jarvis Krumbein on March 20, 2002 18:16:16 UTC |
If your eye is positioned so that the exit pupil of the eyepiece is not at the entrance to your eye,you will not be able to see the full field and may also see the areas of the light cone that are blocked by the diagonal. You can determine where this point is by starting to far away and as you close with the eyepiece noting just where the view has expanded to it's maximum. Any closer and you may start to see shadows of the diagonal etc..
|
|
| 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 |