Flir System. Comparing basic camera specifications such as frame rate, resolution and interface is easy. Comparing imaging performance of cameras such as quantum efficiency, temporal dark noise and saturation capacity is not. First we need to understand what these various measurements really mean. What is quantum efficiency and is it measured at the peak or at a specific wavelength? How is signal to noise ratio different from dynamic range? This white paper will address these questions and will explain how to compare and select cameras based on the imaging performance data following the EMVA1288 standard. EMVA1288 is a standard that defines what aspects of camera performance to measure, how to measure them and how to present the results in a unified method. The first section of the white paper will help to understand the various aspects of imaging performance of an imaging sensor.