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General Photography
Wild Life
Wildlife and Depth of Field
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<blockquote data-quote="Eyelight" data-source="post: 325939" data-attributes="member: 24753"><p>Think of it this way. There are two things that influence DOF, aperture and distance. Distance is affected by the magnification of differing focal lengths, so if you stand in the same spot and change your distance by zooming your lens, the DOF will change. However, if you walk closer to the subject and zoom out to maintain the same subject/viewfinder ratio, the DOF remains fairly constant. Though you have increased your distance (and DOF) by zooming out, you have also decreased it by walking forward.</p></blockquote><p></p>
[QUOTE="Eyelight, post: 325939, member: 24753"] Think of it this way. There are two things that influence DOF, aperture and distance. Distance is affected by the magnification of differing focal lengths, so if you stand in the same spot and change your distance by zooming your lens, the DOF will change. However, if you walk closer to the subject and zoom out to maintain the same subject/viewfinder ratio, the DOF remains fairly constant. Though you have increased your distance (and DOF) by zooming out, you have also decreased it by walking forward. [/QUOTE]
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