[ATM] RC primary-secondary separation.

[Jim Burrows <burrjaw@earthlink.net>]

The average of the last three tests on my RC 
secondary said the wavefront system RMS is 23.1 
nm <whee!> with the mirror-secondary separation = 
417.5 mm.  Time for a star test - haven't been at 
this point in quite a while - the last time said 
the telescope was OK if I stopped it down to 1", 
hope my tests have improved since then.  I'm 
going to have to be careful putting the mirrors 
into the old OTA, the RC surface fit said the 
separation had to be within ± 1 mm of the 417.5 
to keep the RMS less than the passing value of 40 nm.

         -- Jim Burrows
         -- http://home.earthlink.net/~burrjaw
         -- mailto:burrjaw@earthlink.net
         -- Seattle N47.4723 W122.3662 (WGS84)

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