A digital camera is a device that is used to take pictures without the use of film. Unlike a conventional camera, a digital camera does not rely on mechanical and chemical processes. It has a built-in computer and captures images electronically. Owning and operating one doesn't even require the use of electricity.
Since the images that a digital camera captures are in electronic form, it is a computer-recognized language. This language is called pixels, the tiny colored dots represented by ones and zeros that make up the image you just took. Like all regular cameras, a digital camera is equipped with a series of lenses that focus light and create the image you want to capture. The difference here is then; a conventional camera focuses its light on film, while a digital camera focuses light on a semiconductor device that records the light electronically. Think of an onboard computer, it comes in here and breaks that information down into digital data, resulting in all the functions of a digital camera.
Another feature of a digital camera is that it has a sensor that converts light into an electrical charge. A charge-coupled device, or CCD, is the image sensor found in a digital camera. While other low-end digital cameras use complementary metal oxide semiconductor or CMOS as the imaging device, it may still become better and more famous in the future, but most engineers do not believe that it can replace CCD for high-end digital cameras.
A CCD, an array of small diodes, collects electrons when they are struck by photons or light particles. Each diode or photosite is sensitive to light, meaning that the brighter the light, the greater the number of electrons collected.
The price of a digital camera is decreasing these days, one of the main reasons is the introduction of CMOS image sensors because CMOS sensors are cheaper and easier to manufacture than CCD sensors. A CCD and CMOS sensor first work in the same way, converting light-electric charges into photo sites. Simply put, thinking that a digital camera works are like thinking of millions of tiny solar cells, each of which makes up a part of the whole picture. Both CCD and CMOS perform this task using different methods.
Keep these key features in mind when shopping for the best digital camera.
Image quality. Check the camera resolution. The higher the resolution, the more you'll be able to enlarge your image without the grainy or out-of-focus effect we all want to avoid.
Lens. Choose a digital camera with better digital zoom. A camera's digital zoom allows you to take pixels from the image sensor and incorporate them into the image.
Power supply. Always opt for rechargeable batteries, they can always come in handy and you won't spend as much money on disposable ones.
Options. So you can brag to your friends about how good a photographer or artist you are. Or choose the one that offers the options that best suit your lifestyle, so you'll never whine about never getting the right pictures.
Memory. If you're a photography freak, make sure you have enough memory in your camera to take all the crazy, weird, funny, and pretty much all the photos you can. Think 512MB if you're a junkie and take pictures of just about anything.
Computer interface. Always make sure it is compatible with your PC, laptop, palmtop, or any other software of your local image printer, you don't want to be running across the state or country looking for a computer that is compatible with your digital camera. you?
Physical. If you're going to carry it everywhere, choose a handy and portable digital camera. This way, it won't always feel as heavy and bulky as the cameras that professional photographers always carry around their necks. Do they never get tired of it?
These are just the basic things you need to look for when buying a digital camera. The digital camera is so great that it is fast replacing all the conventional cameras in the market, with all its technology and portability, the digital camera is truly the future of cameras.
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