What is the “native” white-balance in Kelvins of the SI-2K sensor?
The CMOS sensor in the SI-2K is approximately “daylight” balanced for 5600K (give or take a couple hundred degrees Kelvin). This is because the sensor is more sensitive to red (specifically infra-red), than it is to blue light. So for a given scene, by exposing the sensor to more blue light and less red light, the response of the blue channel will be evened out with the response of the red channel. For instance, in order to achieve native “white-balance”, one would want the color-temp of the light exposed to the sensor to produce an equal response in both the red, green, and blue channels. If one exposes a very warm source to the sensor, the red response will be very high, and the blue response will be very low as the sensor is more sensitive to red light . . . and the resulting picture of course will not be white-balanced unless digital gains are applied to the blue-channel. As one moves the light source from a warmer to cooler spectrum, the blue light being exposed to the sensor is i
