First of all, Thank you for your reply!

You are right about the aperture. I got confused by the way they wrote 2.8/5.2 on the camera lens.

The aperture is now irrelevant. I would only want to access the focal distance which I guess is stored in (V4L2_CID_FOCUS_ABSOLUTE).

Are there any examples of how to use Video4Linux API in maemo 5 application except for the camera_example? Is it possible to get the full source of a camera example?

Thx,
Klen