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it's a good time to go over why more megapixels isn't necessarily better.

 

So, the nutshell explanation of how a digital camera works is that light lands on a sensor, which converts the light into electrical charges. Depending on the kind of camera you're using, how the light reaches the sensor may differ—honkin' digital SLRs house a complicated pentaprism and mirror system, while the inside of a compact point-and-shoot is mechanically far simpler. At the heart, though, the sensor fundamentals stay the same.

 

The sensor is where most of the megapixel machismo...

 

http://i.gizmodo.com/5155942/giz-explains-why-more-megapixels-isnt-more-better