![]() ![]() The depth of field can be determined by focal length, distance to subject, the acceptable circle of confusion size, and aperture. "Acceptably sharp focus" is defined using a property called the circle of confusion. Decreasing the aperture size ( 4) reduces the size of the blur spots for points not in the focused plane, so that the blurring is imperceptible, and all points are within the DOF.įor cameras that can only focus on one object distance at a time, depth of field is the distance between the nearest and the farthest objects that are in acceptably sharp focus. ![]() The points in focus ( 2) project points onto the image plane ( 5), but points at different distances ( 1 and 3) project blurred images, or circles of confusion.
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