Generally, a digital camera is a hardware device that takes photos and stores them as data on a memory card. Unlike an analog camera that exposes photographic chemicals to light, a digital camera uses digital optical elements to record the intensity and color of light, and converts it into pixel data. Many digital cameras are capable of taking photos as well as recording video. The image is a Panasonic Lumix digital camera.
The quality of the image captured by a digital camera
Generally the quality of pictures that this digital camera can take is primarily based on its megapixel rating. The higher the megapixels, the better the image quality. For example, a 10 MP (megapixel) digital camera will take better pictures than a 7 megapixel digital camera.
Other factors that affect image quality include the type of camera lens, the size of the lens (measured in millimeters), and the type of camera. Low-cost digital cameras often have low-quality and fixed-size lenses and offer minimal zoom capability. More expensive, high-end digital cameras include better quality lenses, larger lenses, and features increased zoom capabilities.
Some digital cameras, such as a digital SLR camera, allow users to adjust exposure, aperture, shutter speed, and other settings, providing enhanced control over image quality. These digital cameras allow attachments to increase or decrease the lens size and zoom length.