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If the focuser has a rubber outer knob, then the rubber may be pushed on too far - just try pulling it back a few mm. (It is a push fit).
If it has a metal knob secured by 1 or 2 grub screws, loosen the screws, shift the knob out a little, then retighten.
Last edited by pdalek; 31-01-2014 at 08:07 PM.
Reason: dyslexic typing
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