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Old 10-09-2017, 11:08 AM
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Paul Haese
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Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,991
Update

I am now approaching final completion of commissioning.

Everything is now screw threaded into position and I have installed shims to adjust for tilt.

I am using the GPU coma corrector which gives superior star sizes and detail sharpness over the Baader. However, the GPU is very sensitive to tilt.

I had to also pay particular attention to the focuser being aligned with the optical centre of the scope. It was slightly out and that combine with tilt made it difficult to find the exact problem.

There is still some slight slop coming from the focuser via the draw tube. It needs some final tweaking to prevent slop from one side of the meridian to the other. Gravity can be a pain in the you know what.

You'll find a few images of the corners of last nights run in the moon light. So ignore the gradients. Flats need adjustment too since my fiddling with collimation.
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