This is sometimes true, but when doing macro photography, the DOF lies equally in front and behind the focal point.Īffects ambient light and strobe light. In nature photography, people are often told that the depth of field lies 1/3 in front of the focal point (closer to the camera), and 2/3 behind the focal point. Look at the first two photos below, in the last section on this page, and you can clearly see the areas that are in focus, which lie within the depth of field. The depth of field extends in front of this point, towards the camera, and behind this point. This area, parallel to your camera lens, is called the focal plane. The sharpest area of the photo is the location your camera focused on. Areas outside of the DOF are blurry, with the blurriness increasing the further away they are. The depth of field is the area of a photo that is in focus. F4 is one stop away from F2.8, so we "stopped down 1 stop."ĭepth of field (DOF) is an important concept. going from F2.8 to F4, is called "stopping down," or closing the aperture. Let's look at the apertures that have a 1-stop difference, going from a large aperture to a small aperture. – F22), the aperture gets smaller.ĭecreasing the aperture by one "stop" will let in 50% less light. F8, F11, F16) and the amount of light that enters through the lens decreases. As the aperture is made smaller, the F-stop increases in number (e.g. Here is a slightly more techincal explanation. The size of an aperture is referred to as an F-stop. F2.8, which lets in the most amount of light. Each lens will have a largest aperture, e.g. The aperture of your lens is an opening that can be made smaller or larger.
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