ISO ISO affects a component of the camera called the sensor. This is the most expensive part of a camera and is responsible for receiving light and transforming into an image. The ISO is primarily used when shooting in low light or possibly making up for a quick shutter speed or a narrow aperture. By increasing the ISO you are increasing the sensitivity of the image sensor. By doing this, the quality of the image decreases and grain is added. Figure 52 - ISO Grain Example (Krešimir Kučko, 2016) The picture on the left was taken with a low ISO and the picture on the right was taken with a high ISO. The exposure (light) is the same in both images. But if you were to not compensate for the exposure change and only changed the ISO then the one on the left would be a lot darker than the one on the right. If you want to shoot in low light conditions you would most likely want a camera with a large image sensor. That way you can pick up as many photons (light particles) as possible. You also want a high resolution image sensor.
ISO ISO affects a component of the camera called the sensor. This is the most expensive part of a camera and is responsible for receiving light and transforming into an image. The ISO is primarily used when shooting in low light or possibly making up for a quick shutter speed or a narrow aperture. By increasing the ISO you are increasing the sensitivity of the image sensor. By doing this, the quality of the image decreases and grain is added. Figure 52 - ISO Grain Example (Krešimir Kučko, 2016) The picture on the left was taken with a low ISO and the picture on the right was taken with a high ISO. The exposure (light) is the same in both images. But if you were to not compensate for the exposure change and only changed the ISO then the one on the left would be a lot darker than the one on the right. If you want to shoot in low light conditions you would most likely want a camera with a large image sensor. That way you can pick up as many photons (light particles) as possible. You also want a high resolution image sensor.
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