[EN] What is ISO and what role does it play in your photos?

It seems that the time has come to talk about the last basic "pillar" of the exposure triangle: ISO. Let's begin!

What is ISO?

Let's recap a bit: the aperture is the hole through which light passes, the shutter is the one that controls how long the sensor comes in contact with the light that passed through the lens, and ISO is the one that controls the sensitivity of the sensor to light that managed to reach it.

What values can ISO take?

The most used values are: 100, 200, 400, 800, 1600, 3200, 6400, 8000, 10000, 12800, 25600.

How does ISO influence the quality of photos and what value should you use?

When you have a good light (for example, daylight), it is recommended to use values between 100 and 200.

At night or when taking a picture in a dimly lit room you can use much higher values (depending on how dark the place is. You must be aware that image noise will appear (the picture will be granulated) the higher you raise the ISO. You can use image noise in a creative way when taking black and white pictures or you want to make your pictures look more vintage.

Before concluding this article I must warn you that if you use a high ISO when you have a strong light, you risk "burning" the picture (you will see a white portion that does not look good in a photo).

I finished this article too! I hope you found it useful and I hope I explained it as well as possible! Don't forget to follow me on Instagram (alex.photo.editor) if you like what I post there and of course, don't forget to leave a comment on this article and subscribe to the blog to receive the latest articles I publish! Byee! :))

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