Pentax K5 LV Focus

This behaviour is consistent with my K5: tripod-mounted, contrast detect, the LV shots are not quite as well-focused as phase detect. Focus is achieved very quickly, and I suspect a higher tolerance for "in focus" compared to phase detect.

I discovered this while taking various near/far shots with all lenses to determine optimal AF fine adjustment settings, and I used LV contrast detect as a standard, assuming it to be the sharpest image, which it was not.