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Thanks WhyFi, Samuli. Duly noted (and bookmarked) about the other (Z*) thread.
And yes, figured as much with infinity hard stop, it's just a nice bonus for low light if you are lucky enough that your lens/camera/climate match.
Good to know on the f/2 contrast, I was just a bit worried, new baby and all, it hasn't been all shots but it has with difficult bright sunlight. Raining again here so no chance to test it all out more.