From the course: The Practicing Photographer

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F-stops vs. t-stops: Understanding what this means

F-stops vs. t-stops: Understanding what this means

From the course: The Practicing Photographer

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F-stops vs. t-stops: Understanding what this means

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- If you've got enough of an interest in photography that you're watching this video, then you are probably already familiar with the term F stop. And you probably know that when you set the aperture on your camera's lens, you do so using an F stop scale. You probably know that changing the F stop changes the size of the aperture inside the lens which allows more or less light to pass through the lens. Changing the aperture makes for a brighter or darker image and because of the physics of light, changing the aperture alters the amount of depth of field in your image. You may not, though, have ever learned exactly what the F number itself means. It's derived from a simple ratio, the ratio of the focal length of the lens to the size of the lens' aperture. That second number, the aperture, is a circle of course, and that's why F stop numbers are so strange. Since the calculation of the F stop involves the area of a circle…

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