#6. "RE: Any image quality comparisons to D300 yet?" In response to In response to 5
St Petersburg, RU
The consensus among owners who have both cameras and who have posted say the DR and noise is lower in the low ISO shots than the D700.
Actually it is quite possible to have a sensor with more noise at some gain figure point and less at others. Many things affect noise generation and noise sensitivity in electronics, non-linearity almost guarantees it. Dealing a lot with designing RF and AF low noise amplifiers, it was always a balancing act trying to determine the optimum compromise for a given application. We see an artifact of this non-linearity by not having straight lines in any currently available camera for DR/ISO graphs. What camera has a linear response over a wide gain and conversion range? I've never seen a graph that is. A good case is the D90 vs D3s, the graphs look like different transfer functions depending on the end of the chart one looks, very different in noise figure at low versus high gain. The D90 at 200 is better, At 102k, well, nothing is better than the D3s. For low ISO landscape, the D3s would not be the camera of choice. The most linear curve is the more limited range of the D3x which shows excellent linearity until about 75 ISO where there is a lot of distortion in the transfer function. This linearity of sensitivity is not discussed much in camera forums but as in any system, non-linearity creates distortion of several types. There is still room for creating amplifiers in cameras that have better noise figures without any changes to the sensor. So good times are coming....