Reviewing Gain

Gain is an electronic amplification of the video signal. This means that the signal is boosted electronically, adding more voltage to the pixels on your imager causing them to amplify their intensity and therefore brighten your image. This voltage increase is measured in decibles (dB) and is calculated using Gain in DB x voltage out or in voltage in. ISO is on the other hand originated from film days and is an acronym for the international standards organization. When film was being used it related to the sensitivity of film to light; the higher the ISO, the more sensitive the film was to light. It refers to the sensitivity of the image sensor in your camera to light. When you capture footage a great deal of GAIN or ISO, it gives you more grain or noise in your video or image file. That means less detail. With these factors in mind, just make sure that you know exactly what you are about to do when you use the gain switch. 


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