A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Astronomy and Astrophysics » Amateur Astronomy
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

reflection of secondary mirror and secondary mirror holder



 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old June 12th 08, 01:52 PM posted to sci.astro.amateur
brucegooglegroups
external usenet poster
 
Posts: 168
Default reflection of secondary mirror and secondary mirror holder

When using an Orion Collimating Eyepiece, if the reflection of the
secondary mirror is completely centered in the crosshairs, but the
reflection of the secondary mirror is not totally centered in the
reflection of the secondary mirror holder, is this an issue?

When I look at the secondary mirror holder reflection, I see a glassy
reflection of light on its edge, which makes the reflection of the
secondary mirror look like it is not centered in the reflection of the
secondary mirror holder.

When I cover the secondary mirror holder with my hand, the glassy
reflection of the secondary mirror is obscured and the secondary
mirror looks centered,

Should I ignore the reflection of the secondary mirror holder?

Also, when I put a piece of white paper in the tube covering blocking
the reflection of the primary mirror, the secondary mirror looks more
or less centered in the focusing tube. It is difficult to see if it is
totally centered due to viewing angles.

Comments?

Bruce
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
collimation of secondary mirror brucegooglegroups Amateur Astronomy 2 June 9th 08 05:08 AM
Secondary Mirror spotting. themeanies Amateur Astronomy 11 February 24th 05 02:16 AM
Help with secondary mirror Lurking Luser Amateur Astronomy 15 January 4th 04 10:26 AM
Reflection from primary to secondary mirror Jim English Amateur Astronomy 6 December 7th 03 01:00 AM
Secondary mirror on a 10" f/5 vL Amateur Astronomy 8 September 27th 03 04:40 PM


All times are GMT +1. The time now is 06:02 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 SpaceBanter.com.
The comments are property of their posters.