>  The two definitions are the same: if you set focus at infinity the
> focus range goes from H to infinity and if you set focus at H the
> focus range goes from H/2 to infinity. The value of H is the same in
> both cases (all other parameters being equal).
>
>   Jerome

From what I've read about this recently, the only (small) difference in setting
focus at H is that the 'acceptable focus' range is *between* H/2 and
infinity--meaning that infinity is at the 'edge' of the acceptable focus.
(Which for most practical purposes, means that it *is* in focus there.)
Apparently, though, many photographers don't adhere strictly to the hyperfocal
distance H, but move it slightly out past that point, to be sure to get the
infinite-distance details pin-sharp.

KW

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