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A digital camera with 12 million pixels is better than one with 6 million. ‘That is correct’ is what you would probably say because you’ve always heard more pixels are better. This is one of typical mistakes in digital photography. The full list of such mistakes you may read here. 
I always say to my friends: too much pixels n a sensor is just lost money. And now I've found an affirmation for this idea...
Achievments of microelectronics make possible to place a millions of pixels onto tiny CCD sensors. Another side of it is producing of image noise. This trouble is better viewed on high ISO values (400 or even more). Sometimes it's only solution to have good shutter speed. But you may foung random colour dots on a solid, ecpecially darkest places.
This problem has a long physical explanation about minimal pixel size, but I don't want to go so deep. But this is a problem of compact cameras with large sensors - above 5-6 Mpix. Indeed, cameras with 2-3 Mp have a noice too, but its amount is not so critical. In fact, optimal number of pixels is strongly defined: The best compromise for a compact camera is a sensor with 6 million pixels or better the size of a pixel with >3µm . Sensors in digital cameras have different sizes, therefore number of 3µm-pixels is different. Sensor size | Number of pixels [Megapixels] | Sensor size | Number of pixels [Megapixels] |
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35 mm | 96 MP | 2/3″ | 6 MP | APS-C | 37 MP | 1/1,8″” | 4 MP | 4/3″ | 27 MP | 1/2,5″” | 2,7 MP |
Last update: 27-03-2008 15:16
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