Modern day digital cameras have the ability to control how sensitive the digital sensor is to light. This is given a numerical value, usually on a scale of 100 - 12,800. In photography and video we know this value as ISO. As the ISO of a camera increases, so does the noise and grain within the image. Lower ISO values like 100 produce a clean, grain free image. Whilst higher values like 8000 produce a much dirtier and noisy image.
So if that's the basics of ISO, what do we mean by 'Native ISO'?
Native ISO is the numerical value that will prodce the cleanest image with the least amount of noise and grain. On the majority of modern day cameras, this is usually ISO 100.
However specialist digital cameras have what's known as a dual-native ISO. In plain, this means the camera has two numerical values at which the image will be clean as noise free. An example of this is on the Sony A7 Siii, the native ISO values are 800 and 12,800.
Film-makers and photographers can use this to their advantage. In low light conditions, ISO is usually a value which gets raised, as it makes the subject brighter. So by having two Native ISO values, the higher one will allow in much more light and still produce a clean and noise free image.
If you want to find out what your camera's Native ISO values are, you can easily search it on google! If you head to the manufacuter's website, they also usually have a guide on ISO values.
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