I did another test today, with excellent result. I wanted to see just how rigid the backplate was with the four attachment points, so I mounted the tube on my EQ6 and did a horizon to horizon sweep. This is a severely overdone test, considering the weight and length of the alignment telescope, which is about 5Kg. It is like attaching a 10Kg camera at the right spacing. Well, the line of sight did not deviate more than 0.002", and that is better than what I was hoping to achieve.
Next I will test the rigidity of the spider assembly, and for that I will have to make an accurate crosshair target.
Last edited by Stefan Buda; 23-12-2018 at 01:26 PM.
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