Some info on the 24 MP Nikon - from a Sony engineer

Started Oct 29, 2008 | Discussions thread
bobn2 Forum Pro • Posts: 69,112
Re: Two inconsistencies...

Iliah Borg wrote:

Yes, but you are comparing the 1DIII FWC at 100ISO with the D3 at

On the sensor level there is no such thing as ISO. On the camera
level ISO is a pretty arbitrary number.

This is not correct, the sensor has a native ISO sensitivity, related to the number of photons needed to reach max output. The Nikon sensor is more sensitive than the Canon one. The effect is that if the camera is set to 200 ISO, the Nikon is using its full well capacity, the Canon is using half of it (e.g. full scale output is reached when the well is half full). ISO is reasonably well defined, so a description of it as 'arbitrary' is also wrong, although different manufactures scale it differently.

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