Mike,
Most of my lenses are old M/F jobs with nice dof engravings so quite easy to determine hyperfocal focussing. Kind of forget that other than Joe, probably all members here are full A/F users. Relavence of that in my PS about poor dof markings on a lot of A/F lenses. Stevies zooms have no markings at all. ( Perhaps I am showing my age. )
Mind you with the 400mm dof is so limited that the lens is only engraved for f22, insufficient space for any more lines no matter how fine.
Don