I understand shutter speed but what confuses me is ISO and Apeture. The Apeture is physically the opening which determines how much light comes in , but ISO determines how sensitive the camera is to exposed light.
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Think of a photo like a painting, only instead of putting paint on a canvas, you put light onto a piece of film (or a digital sensor).
When you’re painting, you can use different things like bigger or smaller brushes, thicker or thinner paint, heavier or lighter brush strokes to change your painting, but how do you do that with light?
You control it through shutter speed, ISO and aperture.
Shutter speed is how long the shutter is open. If the shutter opens and closes really quickly, then only a bit of light gets in and the picture is dark. If it opens for a long time then a lot of light gets in and makes the picture brighter.
Aperture is the size of the hole that the light goes through to get to the film. A bigger hole means more light and a brighter picture. A smaller hole means less light and a darker picture.
ISO is simply how ‘sensitive’ the film is to that light. Much like how quick a canvas can soak up paint. The more sensitive the film, the more light stays on the film.
Now all three work together.
If you need more light, you can either :
Open the shutter for longer
Make the aperture bigger
or use a higher ISO.
Please note this is a very simple explanation of what the three things do. There are other things to think about beyond this ELI5, like subject movement, noise and depth of field etc.
the biggest difference between ISO and Aperture is the grain of the photo, and the focus. With a high ISO your picture will be grainy, and have a lot of colour “noise”. Aperture doesn’t do this, but instead it shrinks the range that is focused in the picture. the lower the aperture, the more open and less range of focus in the picture, and the higher aperture is the opposite. hope that helps
ISO is how sensitive your camera is to light coming in. A high ISO means your camera is very sensitive to light, and will take pictures in dark places better at the cost of a grainier picture quality. Low ISO will take very crisp pictures in high-light scenarios. Aperture is the actual size of the the opening light is coming through, and controls how deep your field of focus is (i.e. is your foreground the only thing you can actually make out or not). Shutter speed is just how long the lens stays open for while shooting. High shutter speed=sharp photo, low shutter speed=blurrier.
You basically did ELI5 in your description.. What is it you don’t understand?
ISO is the “sensitivity” of your camera’s sensor. A camera’s ISO generally ranges from 100 (Low) to 3200(High).Using a lower ISO needs you to open your shutter for longer to allow more light in.Shutter speed is the amount of time your shutter is open for. For images of fast moving objects, high shutter speeds are used. But this usually affects how well the image can be resolved by the camera. A high ISO image is grainy, and has more noise;The aperture here means the size of the “hole” used to let in light in. The wider the aperture the more light is let in. Again, this makes it harder to form a clear image.
For more clarity read :
[https://photographylife.com/what-is-iso-in-photography](https://photographylife.com/what-is-iso-in-photography)
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