Hmm, let me think of this one…..ain't no expert so I'm thinking on my feet..
- Inside focus suggests that the light rays had not yet come to a focus (still converging).
- Outside focus would suggest the light rays had already been focused and were now past the focal plane (now diverging).
So, based on the above:
- Turn focus knob CCW to move primary closer to secondary and continue past the point of sharpest focus = Inside focus.
- Turn focus knob CW to increase primary / secondary separation and continue past the point of sharpest focus = Outside focus.
Therefore, from the point of sharpest focus, I make it:
- Turn focus knob CCW for Inside focus.
- Turn focus knob CW for Outside focus.
Anyhow, that’s how I interpret the meanings.
Cheers
Dennis