Re: SEC: UNCLASSIFIED RE: ATM Collimation Question

[lifedata@vol.com]

afmartyn@raaf.defence.gov.au said:

>However, if
> the secondary is offset, ie away from the focuser and
> down towards the primary, then even if you do a 
>perfect optical alignment, the secondary shadow will 
>still be off centre in the star test.

If you move the secondary equally in both directions, that is,
exactly parallel to its own surface, I don't see how this would
change any alignment. It would merely be like cutting off a sliver on
one end and adding it to the other end.

Jim L
1 John 5:13