Thank you very much Emmanuel, it helps a lot
Field of views is still locked at 2° and result's not perfect, but I can deal with it.
Correct me if I'm wrong, but the narrow field of view acts as a zoom, doesn't it ?
Had to take a 114 m. step back and 65 m. of height to capture a 2,8 m. cube.
I'll have to work my geometry out to get same results more easily.

Others improvements, like objet rotation, are much appreciated too !!

Thanks again