My first try with a script.
Has to be used with manual focus !
It takes all the necessary photos from actual focus point to infinity, to be used in focus stacking.
The number of photos varies depending the actual focal length and f-stop.
I use it with my Powershot S2 IS and Raynox lenses.
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rem Leif Karlsson
@title Raynox
@param n Max number of steps
@default n 200
sleep 2000
for s=1 to n
shoot
get_focus f
get_dof d
g=f+d
set_focus g
print d,g
if g>30000 then s=n
if d<0 then s=n
next s
end
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As my first script... Use at your on risk

Regards
Leif K