Let’s take a real look at ISO
Noise is a random fluctuation in an electronic signal, and those fluctuations come from a number of sources.
The fluctuations show up in photos as pixels that are brighter or darker than they should be, and/or are the wrong color.
Noise is present in every electrical signal, and in every photo you take, but the more you amplify a signal, the worse the noise gets.
That increase in the signal to noise ratio makes the random pixel fluctuations a larger proportion of your image, making it look noisy.
This is what photographers are constantly freaking out about.
And this has got to stop.
Your camera is an amazing tool, but it’s no good to you if you don’t know how to use it!
If you want to take control of your camera and use it to take amazing photos like a pro, check out my Guide to Shooting in Manual Mode video course.