Hi,
Hyperfocal Distance is difficult to explain technically as there are so many variables-
Here is my simple illustrated explanation-
Normally you might take a landscape with the lens focussed on infinity (and f22)
See Image HFD-1
DOF is from about 12ft to infinity reading the distances opposite the DOF scale indicator for f22.
Now focus the lens on 12ft (the near distance for indicated DOF)
See Image HFD-2
Suddenly DOF is from about 6ft to infinity on the DOF scale.
SO IN PRACTICAL TERMS- focusing on 12ft (which is the Hyperfocal Distance here) has given us maximum DOF for this lens at f22. capturing everything from 6ft to infinity.
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