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I noticed on my 10" GSO dob the inward travel stops on a knurled ring that screws into the draw-tube, i machined that knurling down smooth and it gave me another 3mm of travel, enough to be able to photograph the moon @ prime focus through it......
One pic shows the bright aluminium ring that used to be knurled, this stopped the inward travel on the drawtube housing when it had the knurling on it, so i machined it and the other pic shows it a little further in which allowed me to focus the image.
On your telescope this may not be the case......
Last edited by Outbackmanyep; 27-10-2007 at 03:08 PM.
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