Let s look at some digital camera basics that will help guide your purchasing decisions. When the camera's lens is opened, these light-sensitive sensor cells each absorb light coming from a portion of the image you're photographing. A megapixel, one of the terms you will encounter as you compare digital cameras, is one million pixels and is based on the number of sensor cells found inside the digital camera's sensor chip. Every digital camera uses the same basic sensor chip technology. For those conditions, buy a digital camera that has a CCD sensor.
Resolution is the term used to describe the quality of the picture produced by the digital camera.
For example, a camera listed as having a resolution of 640 pixels x 480 pixels has a total resolution of 306,200 pixels. A camera with 1280 pixels x 1024 pixels has a total resolution of 1,310,720 pixels. If you are happy with photos that are 3 x 4 inches, a low resolution digital camera will do. But if you want to turn a captured image into an 8 x 10-inch photograph, a high resolution camera is a must. As you make your purchasing decision, keep in mind that the larger the final image you want to produce, the higher the resolution of the camera should be.