RobDickinson wrote in post #14446896
D800 isnt any better than the 5d3 at high iso.
And the d800/5d3 are so good because they have 2.5 times the area
of an aps-c sensor.
To get the same
results with an aps-c sensor you have to be 2.5 times mote efficient, and current cmos bayer sensors are over 50% efficient already. There just isnt the gains left in this tech.
The D800 may not be better than a 5D3 at high ISO, but it is close. If you consider the pixel density, an aps-c sensor made with the same pixel density as a D800 would be 15mp (and is close enough to an 18mp sensor in a 1.6 crop), hence, why I said that the tech is there - make a cropped D800 sensor, and you'd have a 15MP sensor that stacks up in high ISO to a 5DIII. But Canon tech, it seems, is not there yet. Anyway, that was what I was getting at, I may be wrong in the high ISO capability of the D800 though, as the below quote suggests...
jwcdds wrote in post #14445598
No, the sensor tech is not there. All Nikon did (and by using Sony's sensor) is simply take the D7000's sensor and expand it out to FF. Now under good lighting, you're shooting at low ISO anyway, you can get away with high pixel-density. Take that same pixel-density and subject it to low-light, and the noise really start to show up.
For the record, while I believe the D7000's APS-C sensor is the best APS-C sensor on the market as of the past year or two, it still wasn't that clean when shooting in low-light/high-iso. And what makes it superior is because you can recover quite a bit of detail in the shadows without ugly banding noise creeping up when you start pushing the files a little.
Fair enough, I was under the impression that the D800 sensor was supposedly not all that far short of the 5DIII, I haven't shot either, so relying purely on reviews and random interwebz camera user opinions.
Not too concerned, I'm sill broke and stuck with my 400D for the next 3 or 4 months at least anyway. I'm willing to wait, and will just keep shooting the 400D until I'm back on top of the money things again.