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And from the C9.25 Manual, we have a diagram of the focuser as shown below. I no longer have this knob as I replaced mine with a Hutech mirror lock assembly.
So, it appears that:
Turn focus knob CCW to move primary closer to secondary.
Turn focus knob CW to increase primary / secondary separation.
Does that make sense?
Cheers
Dennis
Edit: Reading the manual further (a novelty for me!) we have:
"Once an image is in focus, turn the knob clockwise to focus on a closer object and counterclockwise for a more distant object".
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