Camera tracking problems with camera data

hey guys, I am trying to camera track a scene and I can’t seem to get the camera motion right. I use a Flip ultra HD recorder, and when I check the specifications I don’t know what goes where: http://reviews.cnet.com/digital-camcorders/flip-ultrahd-2009-black/4507-6500_7-33637213.html

I tried reading on the blender wiki, and it says I can find stuff like focal length and sensor width in the specifications. I guess it has diferent names or something?

I do know the camera was zoomed out as much as possible.

Any help is greatly appreciated and thanks in advance!

The sensor width from that spec sheet is a 1/4.5" sensor which has a width of 3.1mm.

ok, so in the sensor width when I put 3.1mm and it automaticaly changes the focal length 3.391. I should leeve it and it will work correctly?