Quote:
Originally Posted by Peter Ward
I'm still not seeing the Armani suit Bert 
At that focal length, accurate guiding should be a trivial exercise.
I'd put it down to focal plane tilt. F3.0 is *so* terse with any misalignment. (making me worry about the F3.8 RHA incarnation)
Interesting none-the-less. |
If it was tilt Peter the elongation would vary in the direction of tilt. At some point there would be a line of no elongation orthogonal to the tilt. It looks like DEC backlash or overcorrection to me. It could also be slight creeping flexure as that is roughly the direction it would occur depends on the latitude of course..
Bert