Re achieving larger than usually achievable depth of field:

This page provides another means of achieving your  aim.
"Focus stacking":

   http://www.equisetites.de/palbot/tools/focus_stacking.html

Some programs free, some not.
The free "CombineZ Movie" aka CZM seems to do almost exactly  what you want.

Note also the tutorial on using CZM towards bottom of page.

Lots of other related useful stuff as well.


           R
.



_camera
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