Having a slow shutter speed makes photographs seem blurred as the shutter takes a longer time to open and close and catches more light. While the lens stays open the action still continues so this makes the photo blurred, this can be used on purpose for effect.
Having a fast shutter speed almost freezes the action and makes everything look static and not blurred. This is usually what is popularly used as this allows for more detail instead of the objects being lost in the blur.
ISO
The ISO of an image is basically how sensitive the camera is to light, the higher the ISO the more sensitive it is and the lower the ISO the less sensitive. I have played around with different ISOs in different lighting to get either a dark or correctly exposed images depending on what ISO I have used at the time.
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| Low ISO in natural light |
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| High ISO in natural light |
The aperture is how open or closed the lens it, and it is measured in f numbers. The higher the f number the smaller the lens is close and the lower the f number the more open the lens will be. Using aperture you can create depth of field as well as creating little depth of field depending on what type of effect you want to create. Below I have used aperture to create a depth of field by using a low f number and this focuses the lens on the nearest subject and puts the rest out of focus.
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