The FOV of view on my C14 is consistent from night to night. I have the
mirror locked, so the focuser always is at the same location for a given
author of The New CCD Astronomy
From: Paul Luckas [mailto:luckas@...
Sent: Friday, January 31, 2003 10:47 PM
Subject: [ccd-newastro] FOV Question
With a dual focuser system (e.g. LX200 with NGF-S) does the field of view
change slightly if you find fine focus at different positions from night to
night (presumably from changes to the course focuser) ? I seem to recall
discussions regarding focal length variations with SCTs that use movement of
the primary mirror as the course focussing mechanism, and am trying to wrap
my mind around how this may subtlety affect the field of view. Any comments
? Ron ?
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