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Old 20-04-2008, 01:08 PM
Ian Robinson
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Ian Robinson is offline
 
Join Date: Jan 2007
Location: Gateshead
Posts: 2,205
Off-axis Guider or Guidescope

I currently use an old 60mm refractor as my guidescope for guiding my newtonian for prime focus imaging , or side by side with my SLR + telephoto for wide field imaging (on a second smaller GEM).

Works OK , but I am thinking of automating my guiding soon (by acquiring an something like a QGuider) and I am not sure if the rack and pinion and tubes (which are pretty good - tasco 1960s refactors had good focusors) will be up to it , flexure !?!?
This might have important effects in guiding for my newtonian for prime focus long exposure imaging (PEC aside).

So I am considering getting a Lumicon 2" Newt EsyGuider , which needs a bit more back focus (even if it is very low profile).

OK here's the question - will the following arrangement work ?
Seiberb 2" ZeroMagCameraFocusAdapter --> 2" EsyGuider --> Baader MFCC -+ camera .
--> guider

Or should I consider getting a TeleView Paracorr Universial (the photographic one) and the arrangement then becomes :
Seiberb 2" ZeroMagCameraFocusAdapter --> 2" EsyGuider --> Paracorr Uni -+ camera
--> guider
and will it work ?

This would :
1) cut back on the load on my big GEM , no more need for a guidescope.
2) eliminate the guidescope focusor flexure , and guidescope mount flexure issue possibly resulting in much better guiding.

What experience have others here had doing something similar with their fast newts with low profile crayford focusors and heavy (cf guiding eyepieces) autoguiders ?

Last edited by Ian Robinson; 20-04-2008 at 02:13 PM.
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