Meeting Photo Challenges
Creative Image Processing
Nature & Outdoor
Creating Better Photographics
Night & Low Light Photography
Light & Exposure
Close-Up & Macro
Digital Black & White
Color & Design
Choosing & Using Lenses
Digital Photography Equipment
Now we come to how ISO, aperture, and shutter speed relate to one another. They exist to balance the amount of light in the scene with the recording made by the sensor and ultimately made into an image file on the memory card. Your goal is to record the scene with as true and balanced a color and lightness of what you saw when you snapped the shutter.
The aperture and shutter speed solve the exposure problem and create balance between the brightness outside and the sensitivity of the sensor inside the camera. We control them for various image effects, weighing one against the other in every frame we take. We want to create balance, or equilibrium between all the factors.
EV is used in many ways, but just keep in mind that it always deals with working with light. It can be:
For example, if double the shutter speed (say from 1/250 sec to 1/500 sec) you are changing that value by 1 EV. And if you halve or double the aperture setting (which you do by going from, say f/8 to f/11) you are changing the value by 1 EV. So, think of EV as shorthand for how we deal with changes in light levels or light recording in photography.
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