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I think lots of people will be talking about the new 41 Megapixel camera-phone from Nokia ( the PureView 808). This article is the best one I have found that explains the technical details...
http://image-sensors-world.blogspot.com/2012/02/nokia-808-phone-features-41mp-sensor.html

A few notes:
- There really are over 41 million pixels in the sensor
- The pixels are tiny: only 1.4 microns each
- There are 2 main reasons for having so many pixels:
+ reduce noise / grainy-ness in the image by oversampling and then combining pixels
+ Allow for better digital zoom - no need to interpolate when you actually have the pixels
- The output image will typically be 5 megapixels, but you can optionally save images as 8 MP, or 'Full Resolution.'


There is also a whitepaper on Nokia's website, with a few more details, but most of it is summarized in the article I mentioned:
http://europe.nokia.com/PRODUCT_METADATA_0/Products/Phones/8000-series/808/Nokia808PureView_Whitepaper.pdf
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Jeremy Pett's profile photo
 
Holy moly! That is impressive.
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