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Hi Duncan,
If you have any thoughts about maybe hanging a camera or CCD on your scope then I would suggest giving consideration to a motorized version.
I have a JMI Moto focus on my 16" Newt and hang a Barlow, filter wheel and CCD on it with no problems. The focus can be used manually with either a high or low ratio adjustment or by adjusting one thumb screw it can be used as a Moto focus via a plug in remote control hand piece. Having a remote means of focusing a CCD image at very high magnification makes life a lot easier.
The only time I use it as a moto focus is for photography, but it is worth a thought.
Regards
Trevor
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