iso-002IOS is is the sensitivity to light. The higher the ISO, the more sensitive it is. When the IOS is higher, the photo looks more grainy and brighter depending on the aperture setting.

exposure_triangle_jan_messersmithThe perfect exposure all comes down to the exposure triangle, which is made up of ISO, aperture and shutter speed. Having the camera settings in the middle of triangle at 0 on the char will make make the image have an even amount of light.



In this image, the first image has a low ISO, making the image clear, and in terms of the exposure triangle, the settings have been set at 0 on the scale, making the exposure looks even. the second pictures ISO has been set in the middle, which means it will be more sensitive to light, therefore i changed the aperture to a lower setting to not let as much light in. On the last image, i set the ISO to really high, but didn’t change the aperture, therefore its gone really bight and the exposure is too high.