D700 Read Noise
Prepared 2011-12-17 by Bill Claff
The D700 Read Noise values were determined from the Optical
Black data in NEF files.
Here is a table of measured values (in ADUs):
|
ISO |
noise |
gain |
noise |
|
100 |
3.959 |
3.852 |
15.251 |
|
125 |
3.988 |
3.852 |
15.365 |
|
158 |
3.956 |
3.852 |
15.241 |
|
200 |
3.985 |
3.852 |
15.351 |
|
251 |
4.956 |
3.058 |
15.153 |
|
317 |
6.292 |
2.427 |
15.269 |
|
400 |
4.422 |
1.926 |
8.518 |
|
503 |
5.615 |
1.529 |
8.584 |
|
634 |
7.062 |
1.213 |
8.569 |
|
800 |
5.896 |
0.963 |
5.679 |
|
1007 |
7.548 |
0.764 |
5.769 |
|
1269 |
9.210 |
0.607 |
5.588 |
|
1600 |
12.296 |
0.482 |
5.921 |
|
2015 |
15.075 |
0.382 |
5.762 |
|
2539 |
18.643 |
0.303 |
5.655 |
|
3200 |
23.765 |
0.241 |
5.722 |
|
4031 |
30.348 |
0.191 |
5.799 |
|
5079 |
37.813 |
0.152 |
5.735 |
|
6400 |
48.506 |
0.120 |
5.839 |
|
8063 |
30.205 |
0.120 |
3.636 |
|
10159 |
38.100 |
0.120 |
4.587 |
|
12800 |
48.646 |
0.120 |
5.856 |
|
25600 |
48.948 |
0.120 |
5.892 |
The following chart shows these values as a function of ISO:
Shown as a log-log chart for clarity.
The open symbols represent the numbered ISO values while the closed symbols
represent to "Lo" and "Hi" values.
The stepped nature of the open symbols implies a two stage amplification
process.