As long as you don't plan on filming primarily in indoor or low-light conditions, you do not necessarily need supplementary light. Some cameras come with a built-in light source, and many can be programmed to turn on automatically when conditions require additional light. Some cameras allow you to connect an external light source to the unit, for greater control over lighting conditions. This feature electronically stabilizes the image being filmed, but can decrease its clarity. Not common on inexpensie camcorders.
Most cameras use a single CCD chip to capture and transmit image information.
Look for size and pixel specifications, the higher the better. Some high-end cameras use three chips to enhance colors and provide better resolution. This is an expensive feature found only on high-end and professional cameras. Exposure Modes Automatic Most cameras will set the proper exposure mode for the conditions you are filming in. If you are strictly amateur and don't feel the need to alter the exposure, automatic settings will suit you just fine.