From: "Bob May" 
To: "atmlist" 
Reply-To: "Bob May" 


The existance of any rotational error in the collimator in the V blocks
(measure at several distances to insure that you aren't crossing the axis
at some point!) will cause this kind of problem. It is quite easy to get
the collimator so that it is pointed right at the correct spot at 4' but if
you measure it at 8' you will get something else for an answer and that
will be a severe problem. Bob May
http://nav.to/bobmay
bobmay{at}nethere.com
NEW! http://bobmay.astronomy.net

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