A digital camera captures an image through a sensor called a CCD. This sensor has light sensing dots called pixels. The actual resolution of a camera is the total number of pixels that are located on the CCD sensor.

Resolutions of digital cameras range from (0.3 megapixels to 5+ megapixels). A megapixel is just a way of expressing how many pixels are on the CCD sensor, in millions. Thus, a 2-megapixel camera has 2 million pixels on the cameras CCD sensor.

Maximum size an image may be (measured by height x width) for the three most popular types of digital cameras on the market today.

• 2-megapixel digital cameras - 1600x1200

• 3-megapixel digital cameras - 2048x1536

• 4-megapixel digital cameras - 2272 x 1704

But remember, a 2-megapixel camera might produce the same quality photos as a 4-megapixel, but the 4-megapixel will produce a larger image. However mostly the higher the megapixel rating on the camera, the better it has been constructed, and therefore produce better quality photos.