NavList:

   

Reply

Doug-
 I shared your baffelement but it sounds like what Doug is saying is something like this:

A conventional telescope is mounted in a "yoke" of some kind. The barrel can 
swivel in the yoke, but it cannot rotate. Consider, if the telescope could 
also rotate about its own axis--not vertical or horizontal, simply its own. 
If I am understanding this correctly, it means you could paint a clock face 
on the telescope lens, and when the scope was rotated the 12 and the 6 would 
be swapped. Thus ensuring that is the lenses were not perfect or perfectly 
aligned, you'd see some change in the image because of this.

That's what it sounds like from here. "Vertical" seems like the wrong word in 
that context, or else I've got it all wrong.

   

Reply