The rig holds the camera by it's 19mm baseplate so it can be used with a number of different cameras and keep the lens centred. I have also set it up with a Nikon digital still camera for testing purposes.
Here is the setup and the results of a test made with a 35mm masterprime and then shot on a nikon digital still camera, the subject was a 25mm high plastic figure of a world war one soldier. The pictures are from a mobile phone or from my "Testing camera" They all link to a full res image.
This soldier was photographed at a significant distance from the lens to allow for lighting.
These are the two pictures .. one at T1.3 and another at T22

The focus is obtained by moving the camera back and forward on the slider. And can be preset or motion controlled ..
Daniel asked me to help him build a camera system to shoot this.

I built the box with a computer to control the camera (Canon 50d) and I wrote some software to control the camera and to blow off rain, wash the glass and heat the glass (although the heat of the computer running keeps the glass clear) and to vent the box if it gets too hot .. Everything is powered via a UPS that will run the camera for a whole week. Although the computer is internet connected via the mobile network, due to the ammount of data involved the images are downloaded to hard disks and removed manually ..
The camera is now running at the site in Fromelle
I
particularly enjoyed
this job, especially working with Gaute and Anders.
We shot the backgrounds first around Istambul at 1 fps
to make it easier to remove the traffic. Then we shot the
fingerboards in a studio with a scaled set. 
For me the notable shots were ..
In the first shot we removed the drivers seat and the back seat from a small car and mounted the slider fore-aft .. we then shot the same move with the windscreen removed.
For the “Car park” shot we under-slung a Ronford seven (as we did not need pan and tilt on that shot).
For the track into the
bus. The slider was underslung rigged out from the dolly so in
theory we could have tracked left to right on that shot as the
skateboard weaved towards the bus. In fact we shot it as a straight
track in .. There was lots of talk beforehand about how we could
shoot the fingerboard for this shot in the studio .. The problem was
that the camera was so low in the original shot that if we had tried
to track that low in the studio we would have been under the floor
with the camera. We built a small motion control conveyor
belt, we loaded the conveyor with green paper from a colourama roll
and then scaled the track axis from the original shot to the conveyor
belt .. although it took a day to build and test the conveyor belt,
the actual shot took about a ¼ of an hour from start to finish in
the studio ..