Question : Problem: Webcam with a very long cable

Hi friends,
I would connect a webcam to a notebook with a very long cable (up to 150/200 meters). Is it possible ? What are the problems that arise with a so long connection ? Is there an alternative solution (cheap please !!) ?

The aim of this long distance connection is monitoring some colonial nesting birds without disturbing them...

Thanks for any useful suggestion.

Answer : Problem: Webcam with a very long cable

The Dlink DCS900W has been on sale for as little as $99.

As far as the power cable:
Assume that #20 gauge is used, 500m long, or 1km total wire length.
This gives about 34 Ohms
http://www.cirris.com/testing/resistance/wirecalc.html
Assuming the camera uses 0.25A, there will be 8V drop accross the cable.
You will probably need a regulator at the camera end. A good solution would be to apply 24V to the cable, and on the far end use a DC/DC converter with 12-36V input and output matching the camera. Put this in a water tight box and you are good to go. Surplus converter will be about $5.
If the cable is only 150m the drop will be about a third, and no regulator may be needed.
You can also use a say #16  wire for about 3V drop for 1 km at 0.25A, or 1V drop at 300m.