Hi Greg,
Glad you just made focus with 2.5 mm to spare!
I think the question you need to ask is whether 2.5 mm is enough room for FM to work? I know at F7 I'd need more room. I guess at f3.8 things would be more compressed. I think FM likes to take a bunch of images at HFD = 10 and then move to focus. My version of FMV4 does that on both sides of focus so hopefully you easily get to HFD=10 or 12 before running out of room. If not perhaps you can tell FM only to move in to focus.
Re @focus, I've never tried it but others claim it works quite well and is a lot faster than FM.
Peter
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