View Single Post
  #11  
Old 28-12-2010, 03:11 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,080
Quote:
Originally Posted by Jason D View Post
When we align the secondary mirror, there are two different alignments we have to take care of that are independent of each other. One alignment has to do with the secondary mirror placement under the focuser to center what is referred to as the 100% illumination field. The other alignment has to do with eliminating the tilt between the eyepiece and primary mirror focal planes.
Jason, just checking I got this right - quick question. You can exhibit case 1 and still have the scope collimated but case 2 would show up with the A/C correct? So there's no way the scope can be accurately collimated and show tilt right?
Reply With Quote