Not any particular model, but with the following characteristics:
- video out, not usb
- optical zoom
- decent quality (see below)
- low power battery operation
- tripod socket
- small
Richt now i'm using a older fuji digital camera with a cracked screen (cost was all of $2), it has a nice optical zoom, a tripod socket, av out, and will run for a couple of hours on a pair of AA Nimh cells - BUT, the av out quality is terrible, very pixelated; I think it just duplicates the pixels on the screen, so although the camera sensor is good what I get for video is not.
I can make boxes and solder small parts and such; so if I have to add a socket or a power supply that's no problem.
Oh, I almost forgot:
- cheap