roy,

I've tested the DOF master Program (The Double Disk one), its working pretty fine.

http://dfleming.ameranet.com/custom.html
I've tried the "hyperfocal chart" as well. It does not work according to your interpretation above.

http://dfleming.ameranet.com/charts.html
Here's how I think it should be interpretated,

For a 28mm lens set to aperture f/2.8, the hyperfocal MINIMUM distance in DOF is 9.3m, meaning that if you set the focal distance to INFINITY, everything from 9.3M to infinity will be in focus.

Here is part of the DOF chart of a 28mm F2.8 lens provided by canon

Aperture=f2.8, Focus Distance=inf, ND=8.25m, FD=Inf

Aperture=f4, Focus Distance=inf, ND=5.89m, FD=Inf

Aperture=f5.6, Focus Distance=inf, ND=4.18m, FD=Inf

Aperture=f8, Focus Distance=inf, ND=2.97m, FD=Inf

Aperture=f11, Focus Distance=inf, ND=2.12m, FD=Inf

Aperture=f16, Focus Distance=inf, ND=1.51m, FD=Inf

In the "hyperfocal Chart" the intersection distance of various "aperture vs focal 28mm" is somewhat close to the Canon's ND(Near Distance) value. This make me believe that the Focusing distance for the chart was fixed at Inf.

A proper hyperfocal chart should be giving you a variable focusing distance instead of a fixed one. Meaning, to get the MIN hyperfocal distance to Infinity for 28mm set to f16. The Chart should be asking me to focus at 2m, so that anything from 0.9m to inf will be in DOF. Sad to say. The "hyperfocal chart" is not able to do that at all. By asking me to focus at inf, 0.6m of usable DOF is wasted at f/16.

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