Sets the Autoguider focus.
2=to: 2!:}Format: AUTOFOCUS <focusvalue>
2=to: 2!:}Example: AUTOFOCUS 3500
2=to: 2!:}Units: Microns.
2=to: 2!:}Range: 0 to 6000.
2=to: 2!:}Comments: The autoguider focus must be adjusted after the telescope focus has been set to focus on a guide star.