![]() ![]() Depth of field is the distance between the nearest and furthest objects in an image that appear in focus. This opening affects both the exposure and depth of field of an image, and we set the size of the opening using numbers called f-stops. ![]() Here is a sequence of photos of the same scene and subject captured at apertures ranging from f/1.4 to f/16 - notice how shallow the depth of field is at low f-stops (as seen in the blurry background) and how deep it is at high f-numbers (as seen in sharper background objects).Ī quick recap of what we’ve covered so far: Aperture is an opening in a lens that can change in size. When talking about aperture, blurry effects in a foreground or background are usually referred to using the term “ bokeh”. Wider apertures produce a shallower depth of field than narrower apertures, meaning that a wider aperture can produce an image with a more blurry background (or foreground) than a narrow aperture. The second variable is harder to understand but makes sense when you see it in action.ĭepth of field is the distance between the nearest and furthest objects in an image that appears in focus.Įssentially, depth of field describes how much of a scene could theoretically be in focus. While ISO affects noise/grain and shutter speed affects motion blur and camera shake, aperture is what affects the depth of field. While all three components of the triangle can be adjusted for equivalent exposure values, each one has a different effect on the resulting image. ![]() The exposure triangle, a popular visual representation of the relationship between three main components of exposure. A larger opening will let a larger amount of light through, resulting in a brighter exposure.Īperture, along with shutter speed and ISO, is one of the three components of the exposure triangle, which is often used to teach the basics of exposure in photography. The first variable is pretty intuitive: a smaller opening will let a smaller amount of light through, resulting in a darker exposure. The two most noticeable variables that are controlled by aperture are the amount of light that passes through the lens (the exposure) and the depth of field of the resulting image. ![]()
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