How does the EVOLT E-500 combat noise commonly found at high ISOs?
Digital cameras vary the light sensitivity of the image sensor by varying the gain voltage applied to the sensor, much like turning up the volume on a stereo. When the gain voltage is increased, as it is when shooting with higher ISOs, the sensor becomes hot. Hot pixels perform differently under extreme conditions. The result is a graininess known as “noise.” Noise occurs whenever sufficient heat has built up on the image sensor. Therefore, it can also be seen in images with long exposures, such as night photographs, due to the additional heat generated by charging the sensor for an extended period of time. All digital cameras include technologies to minimize the effects of noise. The EVOLT E-500 combats noise using NOISE REDUCTION. NOISE REDUCTION is enabled from the Camera 1 menu. After the first exposure, the camera makes a second exposure of equal length with the shutter closed. It then, in effect, overlays the two images, finds the hot pixels in the second image, and deletes the c
