Since some days ago is circulating the news (also on important newspapers) on website and youtube videos that the new smartphone, Nokia 808 PureView has 41 megapixels in its camera, the finnish brand itself that is attracting a great publicity.
But the official videos shows clearly that the camera has 41 megapixels
Certainly there's no much clarity about it, from an official announcement appeared on tom's hardware it is said that the 41 megapixes are essentially to zoom keeping a reasoneble quality oh 5MP, then a DIGITAL ZOOM, but unless it doesn't makes miracles, wich i doubt, the image will have a poor quality, far more lower than a 5MP medium-low level camera provided with an optical zoom.
Moreover the current technology doesn't allow to obtain 41 megapixels on such a little sensor as the one mounted on the cellphone without incurring in huge problems, you have to know the important fact that the amount of megapixels is not a direct rating of a camera quality; it is true that a larger amount of megapixels allows, theoretically, an higher potential resolution, but taht's limited by the optical system used to channel the image on the sensor.
If the potential resolution of the lens is lower than the pixel matrix, then you'll not gain anything by raising the number of pixels, instead the system performance will decrease cause of the higher electronic noise introduced.
I doubt that the lens mounted on this smatphone may have such a high potential resoluion since it's not reached by lenses that costs more than this nokia. Even professional cameras avoid raising too much megapixels, tha new nikon D800 reach 36MP and costs more than 2000€, do you think you can do the same things with a cellphone with the same megapixels? Try to take pictures with a phone with 8MP and to do the same with a reflex with the same MP and let me know...
Articles where i can find senseless sentences like that make me laugh:
"that means that you can zoom without loose any sharpness"
Congratulation to all the pseudo-journalists that pretended to act as photographers leaving behind pearls of wisdom like the one above (that is just one of many).
Maybe this smatphone is really revolutionary, but i bet that in the practice of printing (i.e. a 30x40cm) or pc visualization, we wouldn't notice any difference between a nokia 808 and an Iphone 4s, or other high quality smartphones, or on the contrary we may find the others even better...
I personally think that is just an exaggeration to attract inexperienced users, if you want to have a zoom on a smartphone, to increase MP out of all proportions it's not the right way, it's just a marketing operation to draw attention.
moreover i'm not daring to introduce concept like gamma dynamic, ISO sensitivety etc...