Can it be used as a webcam

Try this
step 1 Check the manual of your digital camera to see if it can be used as a webcam. Many digital cameras have this functionality and even come with webcam software. If your camera didn't come with webcam software, use a third party web cam application such as SarmSoft WebCam. Find SarmSoft WebCam at ShareUp.com.
Step 2 Plug your digital camera's power adapter into the camera. Some won't function as a webcam unless they are plugged into A/C power. Even if your digital camera functions as a webcam while on batteries, A/C power saves your batteries and prevents your camera from shutting off in the middle of a broadcast.
Step 3 Connect a video cable into your digital camera's video "out" port. Your camera likely came with a cable made for connecting it to a to a video source. Plug the other end of the video cable into your video card's video "in" port.
Step 4 Set up your camera as close to your monitor as possible. This allows better face to face communication.
Step 5 Position yourself about 2 to 3 feet away from your digital camera. Most digital camera's focus best at this distance when used as a webcam.
Step 6 Use a separate microphone if your digital camera doesn't transmit sound when used as a webcam. Plug the microphone into the microphone jack of your sound card