How far..
You mean what is the most "northern" object above your local horizon it can point to?
That depends on your latitude, and the formula is (90 - |La|).
For example, for Melbourne at -37°, we can see the objects at declinations up to (90-37) = +53° or below that. Higher dec are hidden from our view here.
In terms of how far from SCP. that is (180-|La|), and (again for Melbourne) that is 143°
This number is independent of the type of mount.
|