View Single Post
  #7  
Old 05-12-2011, 08:28 PM
rally
Registered User

rally is offline
 
Join Date: Sep 2007
Location: Australia
Posts: 896
Frolinmod,

My comment was based on my own and associates repeated experiences with a P-ME and refractors in the field.

The mount is accurately polar aligned and setup with a digital inclinometer with an initial 6-10 point model and adjusted then a second model of around 10-20 points.
Adding another 20 or 30 points didn't seem to make any difference to the pointing.

Using MaxIm at 400% magnification across the sky above say 45 degrees altitude, the cross hairs after a slew to a star and image acquired for mapping purposes will either be on the star or within a star's diameter.
At 1.7arc secs per pixel on mag 4.0 - 5.0 stars that is about the mark.

This is using the standard 6 terms with everything rigidly mounted or attached via custom threaded adapters - there is no measureable flexure.

Rally
Reply With Quote