IntrudctionWhat is the Exposure Triangle? There are three elements that control what exposure you get while taking a picture; Shutter Speed, ISO and Aperture. When in Manual mode, you control all three elements. When in Shutter Priority Mode, you control the shutter and the camera does the rest and in Aperture Priority Mode you control aperture and the camera controls the rest. The only true manual mode is Manual Mode, all other modes are considered automatic, even shutter and aperture priority modes which are semi-automatic. Shutter Speed - the amount of time that the shutter is open ISO - the measure of a digital camera sensor's sensitivity to light Aperture - the size of the opening in the lens when a picture is taken It is at the intersection of these three elements that an image's exposure is made. Most importantly: changing one elements settings will create a ripple affect and in turn will effect the other two elements. You have to have all three elements in mind during manual mode, especially when changing a setting. Remember, each of these elements are aspects of light and how it enters and interacts with the camera. Bringing It TogetherMastering the art of exposure is something that takes a lot of practice. In many ways it's 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 impacts the exposure of the image, but each one also has an impact upon other aspects of it (i.e: aperture changes depth of field, shutter speed impacts how motion is captured and ISO changes the graininess of the shot (noise)).
The great thing with digital cameras is that they are a great way to learn about exposure. Take as many shots as you wish at no cost but with the different modes you can learn at your own pace. Automatic modes make the decisions for you and semi-automatic modes allow you you to make the decision on one or two of the elements. The highest you can go is Manual mode where you choose all the settings. It's best to know your camera and each element of the exposure triangle prior to going full manual.
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AuthorPhotographer & animal lover with a barn full of rabbits and a cat. Archives
January 2021
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