D800 Read Noise
Prepared 2012-02-08 by Bill Claff (revised 2012-02-09)

 

The D800 Read Noise values were determined from the Optical Black data in NEF files.


Here is a table of measured values (in 14-bit ADUs):

ISO

noise
ADU

Gain
electrons/ADU

noise
electrons

50

 

 

 

100

 

3.75

 

200

 

1.72

 

400

5.436

0.86

4.7

800

9.692

0.43

4.2

1600

12.122

0.34

4.2

3200

12.240

0.34

4.2

6400

12.210

0.34

4.2

12800

11.961

0.34

4.1

25600

11.907

0.34

4.1


Note that all electron figures are approximate pending a better measurement of gain.

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.