Exposure Triangle

January 29, 2015  •  Leave a Comment

Anne Brown Photography Blog:

Exposure Triangle

 

The Art of Exposure
It may take a lot of practice but mastering the art of exposure can be well worth it. Working with exposure may often come down to a juggling act and even the most experienced photographers experiment and tweak their settings as they go. Keep in mind that changing each element not only affects the exposure of the image but each one also has an impact upon other aspects of it (ie changing aperture changes depth of field, changing ISO changes the graininess of a shot and changing shutter speed impacts how motion is captured).

 

Digital Cameras Make for Ideal Testing Bed
Digital cameras are wonderful and an ideal testing bed for learning about exposure. You can take as many shots as you like at no cost and they not only allow you to shoot in Auto mode and Manual mode – but, also, generally have semi-automatic modes like aperture priority and shutter priority modes which allow you to make decisions about one or two elements of the triangle and let the camera handle the other elements.

 

Exposure Triangle Worth Noting
Bryan Peterson has written a book titled “Understanding Exposure,” which is a highly recommended read if you’re wanting to venture out of the Auto mode on your digital camera and experiment with its manual settings. In the book Peterson illustrates the three main elements that need to be considered when playing around with exposure by calling them “the exposure triangle.” Each of the three aspects of the triangle relate to light and how it enters and interacts with the camera.

 

Three Elements of Exposure
ISO, the first element, is the measure of a digital camera sensor’s sensitivity to light. The second element is aperture, which is the size of the opening in the lens when a picture is taken. The third element is shutter speed, or the amount of time that the shutter is open. It is at the intersection of these three elements that an image’s exposure is worked out.
 

 

Any Element Change Has Impact
Always remember that a change in one of the elements will affect the others. This means to isolate just one of the elements, you always need to have the others in the back of your mind.


Check out this tutorial and others at

http://digital-photography-school.com/


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