Bumblebee2 applicability for long-range object detection

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Hello.

Maybe this question is little offtopic here (sorry if so), I don't know where to ask it instead.

I need a method to detect the following kinds of objects using a stereo camera:

• any large obstacle, like building or tree, on a distance about 15m (tolerance doesn't matter, it's just for long-term collision avoidance)
• human body on distance about 7m
• a human's hand on distance about 2m

(Assuming good lighting, clear view, and so on)

Question for the people who have practiced with Bumblebee2: is this camera a good choice for these tasks? (http://www.ptgrey.com/products/bumblebee2/bumblebee2_stereo_camera.asp)

The Point Grey folks gave me nice guidelines about the stereo accuracy: http://www.ptgrey.com/support/kb/index.asp?a=4&q=103, but this isn't enough to make decision.

Thanks in advance,
Pavel.

UPD: Are there any other stereo cameras that are supported by ROS? A TOF camera seems to be a poor choice because of long ranges.