To take photographcs in either digital format or onto a film. Also some cameras can take video in either digital form or on film.
Other functions would just be your main settings for the camera, flash, red eye, corrections of impurities etc.
functions of the principal components of a digital SLR camera
Camera
It's an automatic digital camera without manual functions.
If you get into a car accident the footage recorded by the camera can be used as evidence.
If you have photographic memory then your eye functions like a camera in a way
Take pictures
This is a place that you can put your camera to charge it, to upload pictures, or other functions. A digital camera dock can do several things.
you can find a cheap high quality digital camera with outdoor functions like glare control in almost any camera that is on the market right now but go with canon.
A camera, a photocopier, and a slide projector all use lenses to perform their functions.
you can vc on ichat and use photo booth
A video camera and a SOUND recorder? Any video camera with onboard storage--whether it be tape or digital memory--will record sound.
There are a lot of kinds of camera to use for video conferencing. However, in order to take the best one, one should consider on the HD functions of the camera.