Canon 5D2 performance summary

Based on this.

Readout noise at ISO 100: 28.92 e-

Readout noise at ISO 200: 14.59 e-

Readout noise at ISO 400: 7.71 e-

Readout noise at ISO 800: 4.19 e-

Readout noise at ISO 1600: 2.63 e-

Readout noise at ISO 3200: 2.55 e-

gain at ISO 200: 0.405 ADU/e-

gain at ISO 1600 3.2 ADU/e-

effective dark current at 20 deg C: 0.86 e-/sec

effective dark current at 3 deg C: 0.051 e-/sec