Re: Re:ATM eyepiece re-assembly

["Bob May" <bobmay@nethere.com>]

Now that you think that you have the lens together, look into it and see if
the aperture stop is in focus.  That is the black ring that defines the FOV.
After that, you can take a hair and stick it with some spit to that aperture
ring and it should all be in equal focus.  Another test is to remove the
barrel and see if the optical train will focus on a piece of paper.  The
focal plane should be fairly flat (+/- a thousandth of an inch or so) so you
should be able to nicely focus on something.
No need to go out and use the scope.  Everything is done in a nice bright
room.
Bob May
http://nav.to/bobmay
bobmay@nethere.com
NEW! http://bobmay.astronomy.net