This is the working prototype of an Iris controller I made for Canon EF lens.
The next step will be a focus follower working with the internal motor of the lens. It works with Ef-Sigma lenses too.
Lcd real shows aperture or focus ring position.

EF lens controller on Vimeo

Matteo,
Great work. Love the back ground. Good luck with the focus control. I'm sure Birger is watching.
Birger Engineering, Inc. (http://www.birger.com/)

Yes Dennis, kind of looks like my office on a good day, except he doesn't have the layers of stuff i have all over the walls...

But speaking realistically, Matteo, it's great to see a step forward in this direction.
Please keep us informed how it's going