polar axis scopes dimensions request
Posted 29 October 2012 - 11:35 AM
I recently acquired an EQ mount once sold as the Tasco 7701 (perhaps OEM from Vixen according to some posters)
I would like to locate or adapt a polar scope to use with this mount; inspecting the data for currently available Vixen polar scopes suggests that they are not directly compatible. Perhaps I could adapt a Celestron or Orion polar scope intended for the CG-4 or CG-5 mount if the tube would fit (I may need to machine a collar of course).
I would appreciate getting the dimensions of those scopes (and any other candidates) from owners: tube length and diameter, mounting arrangement details, collar dimensions, thread sizes and inner diameter of interior threads of any mounting collar, etc.
I am not in the same place as the mount as I compose this so I cannot provide dimensions but will edit later to add them; I just hoped to start getting some data early on to help me make ordering decisions.
Posted 29 October 2012 - 01:20 PM
Here's a shot of my Vixen Polaris mount with the polar scope:
Posted 29 October 2012 - 03:51 PM
If you are so inclined, it would be useful to have closeup photos of the sky-end of the mounting ring/collar and some dimensions of the scope tube diameter, length, etc. of yours.
Posted 29 October 2012 - 04:35 PM
25mm or 26mm x 1 or 1.25 mm thread
90mm from end of objective to end of threads
56mm or so for the hour/date ring
138mm overall length
doesn't look like it will fit in your mount
Posted 30 October 2012 - 04:26 PM