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Yep, James, they do. Look at the front objective. It will screw in and out on the tube, adjusting the focus. However, there is a locking ring behind it (ie. in the direction of the eyepiece end) which you have to loosen off first, then tighten up when you have reached the focus you need.
I need my long distance glasses to see the stars, so I find it convenient to set the focus for when I am wearing my glasses (which then come off as I move to look through the eyepiece)
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