ATM 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 |
| Achromat Air-spaced Shims
Forum List | Follow Ups | Post Message | Back to Thread Topics Posted by Fiesta/">Fiesta on January 20, 2000 14:04:57 UTC |
Has anyone ever replaced the three spacers in an air-spaced achromat? If you have some experience with this, I have some questions: 1. How critical is the thickness of the spacers? 2. What are the best materials to use as spacers? 3. What is the best way to make sure the spacers do not shift when the retaining ring is screwed back on. A second issue relating to the air-space distance, has anyone experimented with the seperation and/or rotating the doublet for better color correction and alinement. Excuse my spelling. |
|
| Additional Information |
|---|
 |
| About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy |
|
Unless otherwise specified, web site content Copyright 1994-2025 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 |