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


Make both mirrors spherical on the same lap at the same time and you won't
have any problems.  Any difference that you get from the two being of a
slightly different FL due to differences in figuring will be quite small.
FWIW, many people with glasses have a difference of focusing such that
there can be 2 diopters or more between the two eyes.  A diopter is the
change of incoming light as produced by a lens with a focal length of 1
meter.  2 diopters is a focal length of 1/2 meter, etc. with the formula of
1meter / diopter = focal length.
Bob May
http://nav.to/bobmay
bobmay{at}nethere.com
NEW! http://bobmay.astronomy.net

--- BBBS/NT v4.01 Flag-4