Learning picture-taking is a complex process and requires a lot of patience and practice.
What is ISO
ISO is referred to as one of the three pillars of photography that affect the look of your images. In the photographic world, ISO is most commonly referred to as a film rating system. It measures the sensitivity of the image or video sensor to light.
How to use ISO in Photography
ISO is a camera setting that will brighten or darken a photo. As you increase your ISO number, your photos will get brighter. For that reason, ISO can help you capture images in darker environments, or be more flexible about your aperture and shutter settings.
ISO Settings and Grain
If the ISO setting is raised too high it will show a lot of grain, also known as noise, and might not be usable. So, you should only raise your ISO when you are unable to brighten the photo using shutter speed or aperture.
Maximizing image quality using ISO
You should only use base ISO when there is enough light to do so. Don’t try to use ISO 100 in a dark environment, or your photos will come out way too dark. Similarly, if you’re using fast shutter speed to capture the action, it’s essentially the same as taking pictures in a dark environment. For certain types of sports and action photography, a high ISO might be your only option.