Better cameras can handle 24-bit color, which means they can recognize up to 16 million hues. This approximates the range of the human eye. The number of pictures a digital camera can take is determined by its resolution and memory. Low-end digital cameras typically store between 16 and 40 pictures. The actual number may depend on the resolution and compression ratio you choose.
Most cameras come with snap-in memory modules.
When you fill one, you can replace it with another. More sophisticated cameras may have internal floppy disk drives or even tiny hard disks . The best can store a hundred pictures or more and even record sound bytes to go with each shot. They're fine for small groups or landscapes, but tend to exaggerate noses and chins on closeups. Better models have zoom lenses that range from wide-angle to short telephoto.