Lumia 830 doesn't seem to be 10MP

[Roger Deep]

It's not at all marketing or adversiting, it's the reality. The sensor is round, you have to crop a rectangle out of it.

Look at this illustration (for the Nokia 808, it's the same for the 1020, and, the principle applies to your 830)

http://www.esato.com/gfx/news/img/nokia-808-pureview-41-megapixel-image-sensor_1330382356.jpg

Excuse me sir, but there is something that I don't understand about the sensor being round.

[video]http://www.wpos.com.ua/wp-content/uploads/2012/09/Nokia-808-PureView-vs-Lumia-920.jpg[/video]

As you can see, the sensor is not round. The sensor cage is round but the sensor is not. Also never heard about round sensors in phones. Guess I have to study this but sensors are rectangular. Can you point some that are round? And in Lumia 830?
Thanks

 

[bokchoy1]

Looking at the picture, the circle is probably the image produced by the circular lens. The sensor is rectangular. It does need to be bigger though as a result of having the width of the 16:9 shape and the height of the 4:3 shape.

 

[msirapian]

Excuse me sir, but there is something that I don't understand about the sensor being round.

[video]http://www.wpos.com.ua/wp-content/uploads/2012/09/Nokia-808-PureView-vs-Lumia-920.jpg[/url]

As you can see, the sensor is not round. The sensor cage is round but the sensor is not. Also never heard about round sensors in phones. Guess I have to study this but sensors are rectangular. Can you point some that are round? And in Lumia 830?
Thanks

What bokchoy1 said. Actually, most sensors are 3:2 ones, and you need to extract 4:3 or 16:9 out of it. I suspect the circle represents, for Nokia, the usable part of the sensor because of optics.