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What is ISO?

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ISO (International Organization for Standardization) is the number that represents how sensitive your camera sensor is to light.

By having a lower ISO value it makes your cameras sensor less sensitive to light which is perfect for locations with lots of light. By having a High ISO value it makes your cameras sensor more sensitive to light which is ideal for locations with minimal amount of light. However using a High ISO value can affect the image quality of your photo making it appear noisy and grainy.

High ISO is sometimes needed because if the conditions of your photos are dark and doesn’t feature a lot of light then a higher ISO can help brighten the image but also degrading it in the process. Below is an example of an image taken from a Low ISO value at the start to a High ISO value at the end.

As you can see the first image taken at a Low ISO value is much sharper and the details of the photo can be seen, on the second image we can notice that the photo is starting to degrade and the noise and grain can start to be seen and the detail of the image is becoming lost, on the last image we can notice that there is much more grain and noise on the photo and the details on the image cannot really be viewed anymore.

My Photos of Different ISOS

ISO 100
ISO 200
ISO 400
ISO 800
ISO 1600
ISO 3200
We can see with this image (taken at ISO 100) that the low ISO has made the image quite dark so it makes the paper balls in the image hard to see and identify well. We can also see that with the low ISO the image is quite sharp and does not contain any intense grain.
We can see with this image (taken at ISO 800) that the high ISO has brought in more light into the image making our paper balls more visible and easy to identify. However due to the high ISO the images quality is starting to be affected as we can see that the noise and grain is becoming visible around the image.
We can see with this image (taken at ISO 6400) that the higher ISO has made the image lose its sharpness and details. Grain and noise can be visibly seen everywhere on the image and the paper balls colour and texture looks faded and smudged compared to the ISO 100 image.

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