Looking for webcam with 5MP or more true not interpolated. With optical zoom, focus, exposure, gain.?

There is a limit to how many pixels can be crammed on a tiny sensor like those on webcams. There is also a limit to the amount of data you can steam to the Internet. A 5 mp sensored camera can produce a 2572 x 1928 pixel image. How large a video image it produces will be much smaller, even HD video is only 1280 x 720 or 1920 x 1080 @ 30 fps, but typically video is set at 640 x480 @ 30 fps, so you can see, finding and buying a 5 mp webcam may not be what you really want if your intent is to broadcast your streaming video over the Internet. If you want the highest quality you can stream, you may want to look for an HD webcam Here is one such webcam http://www.huehd.com/products.html