Saturday, September 11, 2010

Digital Camera and Megapixels.

Digital photos created with digital cameras are made up of dots called pixels.

Pixels are arranged in horizontal rows and vertical columns, and as so they create a rectangular image.

If you multiply the number of horizontal and vertical pixels you’ll get the resolution of an image, but, because we are talking about really big numbers, it is used increasingly popular expression megapixels.

Common values are 3, 4, 5, 6...megapixels. The higher the number, the better and more detailed image is.

But, no matter how many megapixels has the camera that you have used or intend to buy, its resolution is null according to that used for telescopes - 15 megapixels and more.

Champion among them is the telescope in Hawaii, which is called “Megacam Wide Field.” The astronomers use it to photograph supernovas (dying stars) in amazing resolution of 340 megapixels.

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