RE: [APML] Testing Lens Aberrations

["Thomas W. Earle" <twade@bmi.net>]

Bobby,

I really appreciate the excellent advise.  You also sparked a
thought in possibly avoiding possible "aberrations" due to
atmospheric extinction (i.e., stay with targets above 30 degrees
altitude).  This should keep atmospheric "contamination" to a
minimum; however, with lens' focal lengths between 55-300mm, I may
not need to worry about it as much.  I'll be using a STV for guiding
so guiding errors should be minimal, assuming I get good polar
alignment.

Wade


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