How much do you really understand ISO? Different cameras handle ISO in various ways, and increasing ISO doesn't always mean the sensor is more sensitive to light.
in its newest video. Syrp Lab takes a deep dive into ISO, explaining what it is, discussing Dual Native ISO and ISO variance, and providing the information people need to shoot the cleanest possible video.The first step along the journey to cleaner video is understanding what ISO is and what it does.
When light travels through a lens and hits an image sensor, the sensor measures the intensity of light as voltage. The voltage is converted into a digital value using an analog-to-digital converter. When the values are too low — the video looks too dark — the sensor can’t physically change to have larger photo sites.
“For an ISO invariant camera, the signal is boosted digitally, meaning that the amount of noise is equal across all ISOs,” says Syrp Lab. There isn’tnoise at the sensor level because the sensor isn’t becoming more sensitive to light, but the noise becomes more visible as the footage is brightened. When users have no option but to change their ISO to adjust to the prevailing lighting, the recommended workflow depends on how a camera handles ISO.
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