Does the mega pixel size of a digital camera matter?
Here is an hidden fact, or maybe a forgotten reality on digital cameras. The short answer is no, unless you need it for a very specific purpose. For a general use we don't need anything more than 2-3 mega pixel camera.To make the argument easier to follow let's round the numbers.
An average computer monitor would have about 1600x1200 (resolution) which is about 2,000,000 pixels, or 2mega pixels. That is physical dots on your screen (say LEDs). These dots are controlled individually by your graphic card to different colors, which overall these 2,000,000 dots make an image on your computer screen. In fact you could see the pixels on your screen if you look closely with a magnifier. It is easier to see them on a TV screen as they have much less resolutions (about 80,000 dots).
If you have an image of 2mega pixel and monitor of 2mega pixel, you have a perfect match. You should see it clearly and every single pixel of image would fit on every single pixel on your screen dot by dot, pixel by pixel. For a 2 mega pixel camera you miss no pixels. All the information on your camera will be displayed on your screen. Now what happens when you have an image of 3mega pixels? Because of its physical limitations, it skips every third pixels. It just can't fit 3000000 dots in 2000000 available spaces (dots/pixels). Similarly if you have a 4 mega pixel image (camera), computer has to skip every second pixel to be able to accommodate all the information and shrinks them all into that limited space. Scanning ( like a camera) and reproduction of it as an output on the screen do not match. So what is the point of having a camera with 3 or 4 or even 10 mega pixel when you can't even see the out put result. Of course we can't tell the difference of a picture quality just by looking at the screen as our eyes are not designed to distinguish each individual pixels amongst 2000000 of them.
We will be covering other aspects of digital cameras in next chapters......very soon.....
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