Quote Originally Posted by Eric Dose View Post
I suspect that you haven't yet set up Focus Offsets in ACP.
You're right about my not having setup the Focus Offsets in ACP. I have never used them in the past, nor have I ever set them up. I have always simply had ACP focus with each filter in the past.

Any other thoughts? As I am using Astrodons, the filters themselves are actually fairly close to parfocal on my system, but the amount of focus error is more similar to the amount the FMx is moving at the beginning of a focus run.