Before buying a digital camera, consider for what purpose you will use it. If you need to illustrate your page on the Internet, it will be enough the camera with low resolution. But if you’re going to make prints from obtained images, to receive high-quality photos, you will need a camera with high resolution. Four main factors have a crucial impact on your digital camera:

- Resolution
- Method of operation of CCD
- An optical device of the camera
- Software that “works” with the image.

Resolution is determined by the number of light-sensitive diodes on the surface of the CCD. For example, if the manual says that it has a resolution of 1600X1200 pixels, this means that the CCD has about 2 million diodes on its surface. Each of three different diodes on the surface of the matrix can write data about one of the primary colors. In order to obtain data about the color of each pixel, we need to know information about the illumination of at least three diodes. This reduces the actual number of pixels in a three-fold. Instead it the software is used that allows you to equate the number of pixels and the number of diodes.

Although the statement “the more pixels, the higher the resolution, the better the image” in the main is true, however, other factors have a significant impact on the quality of the “picture”. So it is very important the quality of the production of the CCDs. The more qualitative made the matrix, the less it will have broken diodes (the size of one diode is about 7.5 microns), which will directly affect the quality of photos.

Unfortunately, the quality of the CCD cannot be described by any numbers or categories, so only a careful comparison of different models guarantees the purchase of the best camera. Focus on the field, clarity of the visible image. If you are satisfied with the quality of the image, then test the camera under different lighting conditions. Ask also, if possible, to print the captured image; it will give you more information about the CCD.

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The digital photo cannot be comparable to the analog photo (which uses slides or negatives). From a technological point of view it is rather closer to the video shooting, which receives an image at every moment of time.

Let’s take a look at how the analog camera operates.

In simple terms, the analog camera consists of the system of lens, aperture and shutter; the light, having focused in the objective-glass, passing through the diaphragm at a time until the shutter is open, falls on a photosensitive film. Under the influence of photochemical processes the image is “recorded” on film and in the future it can be restored by developing.

Although digital cameras look like as analog, they use different principles of operation. Both cameras have the system of lens, aperture and shutter, but recording methods differ radically. The digital camera stores images in digital format on the special media. Closer examination helps to understand the difference in working methods.

The heart of a digital camera is CCD (charge coupled device) hidden behind the diaphragm and consists of a photosensitive semiconductor elements made from a variety of silicon diodes. When the light reaches the CCD, it charges each of the elements – pixels individually.

This charge in the future corresponds to an electric pulse, and so we get the data in digital form about illumination of each pixel. Since it is impossible to record all information about the whole image, but in future it is processed by software to recover lost data and recorded on magnetic media. Thus, the digital photography is a combination of CCD sensor, software and memory cards, replacing the film in the analog camera.

CCD matrix is not greater than the nail on the finger, and contains several millions of light-sensitive diodes, located on the surface of the matrix in the form of columns. Since the matrix responds only to the brightness, the digital camera can produce only black and white. However, there is a way to capture all the colors of the image by using different color filters in the lens: red, green, blue, or a combination of colors that gives the most realistic picture.

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Today it seems that everyone enjoys taking photos of their children, especially during the holidays. Today it is great that there is no need to develop the film, make prints and after that mail them to your relatives. With the development of digital cameras you could just download the photos and send an email. Sharing photos with your beloved has never been easier. And if you want to get rid of the old film based camera and purchase a digital one, this article is right for you. Below there are some tips that may help you.

- First of all, you have to do some research. When you are going to a shop and seeing a lot of different digital cameras, you could easily become frustrated because of the variety. And thus you have to learn what each feature does as well as what the reviews say about various models of photo cameras. It is necessary for you to know what optical zoom, memory and megapixels mean.

- As well you have to know what exactly you need. When you know everything there is to know about different features of digital cameras, you have to figure out what you will do with it. Determine whether you need a new camera to take some family photos or you need it for work as well as whether you will take a lot of photos or just from time to time.

- Set up a budget. Today buying a digital camera could set you back anywhere from as little as $100 to $1000 and even more. Of course, it is great that you have a lot of different options to choose from, but you have to know what you are paying for.

- Determine the type of resolution you need. The actual number of megapixels is one thing that makes all the difference. Keep in mind that if you want big prints, then you need to look for a camera that has not less than 5 megapixels.

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When looking for a new digital camera there are a lot of different things to take into account. However, high quality camera could be expensive. And thus you have to make sure that you invest in the proper camera for your needs. Below there are several things that you have to take into account in order to get the proper camera for you.

First of all, you have to decide how much you are ready to spend. The amount of money you spend will reflect the quality of digital camera. If you want camera with manual controls and high picture quality, you have to be ready to spend more. Today there is a great variety of types of cameras out there that all offer various features. Keep in mind that you can spend from $50 to some thousands on a digital camera.

As well, you have to know how you will use your camera. Probably you need a camera just to take pictures for yourself or you need it for work. Determining why you need a camera and what features you want it to have will help you narrow the choice.

Today there are a lot of types of digital cameras. And when you are purchasing a digital camera, you could be overwhelmed by all the choices available. Keep in mind that there are several types of digital cameras on the market for you to choose from. There are a lot of compact cameras which are small and lightweight. These cameras traditionally take good pictures, however give you limited control over your photos.

At the same time, SLR cameras are bulkier, but give you a full control over your pictures. As well they offer pictures of higher quality. When you know what you will be using your digital camera for as well as what your budget you will decide which type of camera is right for you.

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