Jared has a valid point, you're probably not going to be able to do direct real time focusing when filters are in use. I think we will have to manually characterize any filter offsets, store those in the SGP Equipment Profile, and have an SGP routine that talks to SharpLock (I think FocusLock is the name of the Optec software, SharpLock is IF's technology) which in turn can drive the focuser in real time.
I've tried FocusLock but it has no SBIG native support, only ASCOM (SBIG's fault, not Optec's) so I can't read the filter positions to apply offsets.
And, I may be all wet :>).
BTW, for the first time since becoming an SGP user, the latest autofocus routines work with my RC scope. I'm getting very nice V curves. Thanks!
BobT
Driftwood, TX