Digital cameras have come a long way in the few years since they were first developed. Digital cameras can do things film cameras cannot: displaying images on a screen immediately after they are recorded, storing thousands of images on a single small memory device, recording video with sound, and deleting images to free storage space. Digital cameras are incorporated into many devices ranging from PDAs and mobile phones (called camera phones) to vehicles.

Digital cameras record color images as intensities of red, green and blue, which are stored as variable (analog) charges on a CCD or CMOS image sensor chip. Digital cameras come with a USB cable for transfer directly to the computer, and many computers come with one or more memory card slots. Digital cameras use either rechargeable or standard AA batteries.

Digital cameras, whether old or new, come in many different styles, shapes, and sizes. Digital cameras have quickly become the camera solution for most users today as the quality of picture they take has greatly improved and as the price has decreased. Digital cameras are principally characterized by their image resolution or mega-pixel capacities; from low-resolution (less than 1 mega-pixel) to high-resolution (greater than 1 mega-pixel) to advanced high-resolution (4 mega-pixels or more).

Digital cameras are rated by the number of megapixels (millions of pixels) they can record. Digital cameras capture and store photographs electronically in a digital format, rather than on film. Digital camera lenses are available in either plastic or glass.

Digital cameras change the way in which photographs are taken today. Some digital cameras now have wireless features where you can immediately send your photos to your computer through a LAN connection. Digital single-lens reflex cameras (DSLRs) are digital cameras based on film single-lens reflex cameras (SLRs), both types are characterized by the existence of a mirror and reflex system.

Most digital cameras measure subject distance automatically using acoustic or electronic techniques, but it is not customary to say that they have a rangefinder. Many digital cameras include a video output port. Most digital cameras utilize some form of removable storage to store image data.

Since film still provides better picture quality, digital cameras have not completely replaced conventional cameras. But, as digital imaging technology has improved, digital cameras have rapidly become more popular. It doesn't matter if you are a first-time user or an experienced digital camera owner ? these cameras are fun and easy.

If you're in the market for a digital camera one of the first things you need to do is figure out what it is that you want your camera to do, secondly you need to know what you're going to be using the camera for. One of the mistakes people make when buying a digital camera is buying one that is too much for them or their intended uses, if you're going to be taking general family photos you don't need professional level camera for that, but in today's society most people think that more is better.

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