Dear friends

i want to know few things regarding logitech pro 5000 and logitech pro 4000 webcams. I have both and i want to use it for stereo vision. If these webcams and exactly same so that i can use it for stereo vision? Can u pls tell me how to check whether these cameras are same or not? can you pls tell me focal length field view sensor type width and height of sensor?
I need the answer soon...pls reply....i called to customer care also but i could not get satisfactory answers....
thnx...