Understanding the relationship between ISO, Aperture and Shutter speed…
These are the three critical factors in the exposure relationship. Getting a feel for how they work together is the essence of controlling your camera. Several people asked me to find a simple explanation for the way this relationship works after seeing this post yesterday: How to work with your camera settings – a simple, fun lesson.
The key point
The three settings, ISO, Aperture or Shutter Speed are set up on your camera in stops, or fractions of stops. The stop is a photographers way of measuring light in the camera.
The most important thing to remember is that a stop of aperture is the same as a stop of ISO, and in turn a stop of shutter speed. As they equal each other, you can keep them in balance. If you put one setting up a stop (or fraction of a stop) you can put one of the others down a stop (or fraction) and you will get the same exposure. This allows you to change your settings to get a different result (more bokeh, less movement blur etc) but retain the same exposure levels.
The two videos below will help you to understand the way the settings work. I have given you two versions of the same information. They both present differently, and they both have snippets of information that are different from the other. However, they both cover the same material. I hope that one or both of them will help you to see how the settings work. Enjoy!
Aperture Shutter Speed and ISO, Photography 101
The second video covers almost identical material but shows some of the points through the camera viewer. This helps you to see the context of the settings easier.
Exposure (Aperture, Shutter Speed, ISO)
Now try out your new knowledge…
Now you can try out CameraSim in yesterdays post. Try varying the settings for yourself like they did in the videos and see how they work together to get an exposure balance.
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Definition: f number
Definition: Shutter Speed
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