• Wale Fowokan

Understanding ISO – A Beginner’s Guide

ISO: is an avenue to brighten photos after pushing shutter speed and/or wider aperture to their limits. Lower ISO number results in a darker/cleaner image, while higher numbers brings about a brighter/grainier image. However, the effect of increasing your ISO is visibility of graininess/noise in your images. ISO is measured in  numbers e.g. ISO: 100, 200, 400, 800, 1600, 3200, 6400, 12800 etc


The most important thing to remember is, ISO controls the brightness of your camera sensor. Lower ISO means lower brightness and higher ISO mean higher brightness/higher noise. In as much as you will prefer a clean picture (using low ISO), there are situations where you need to freeze actions of your subject which requires you to shoot at higher shutter speeds. This will require you to bump up your ISO to compensate for that. It is understandable that increasing ISO will introduce more noise/grain to the picture.


To assist beginners, I have prepared a guide for ISO settings in various lighting conditions.

I hope this little piece of information will help you in becoming a better photographer. I will putting writing about APERTURE in my next blog post. If this post is useful for you,  kindly subscribe for more educational contents like this. 

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