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Photography Q&A
Autofocus mechanism
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<blockquote data-quote="Eyelight" data-source="post: 369501" data-attributes="member: 24753"><p>I found the stream, but not that shot. But, I try never to be in a hurry and cropping from the original would give the best detail.</p><p></p><p>Bear in mind when imagining the DOF that it is an arbitrary system to yield distances related to our perceptions of what we see when looking at a certain size image from a certain distance. Just as motion blur is always there, but sometimes not perceived, blur starts at the focal plane and increases to the near and far. We don't call it blur until we perceive it. When viewing an image at 100% we are in effect, reducing the DOF by increasing the blur nearer the focus point. So, a wingtip that is nearer (or farther away) than the focus point is always going to be in less sharp focus.</p></blockquote><p></p>
[QUOTE="Eyelight, post: 369501, member: 24753"] I found the stream, but not that shot. But, I try never to be in a hurry and cropping from the original would give the best detail. Bear in mind when imagining the DOF that it is an arbitrary system to yield distances related to our perceptions of what we see when looking at a certain size image from a certain distance. Just as motion blur is always there, but sometimes not perceived, blur starts at the focal plane and increases to the near and far. We don't call it blur until we perceive it. When viewing an image at 100% we are in effect, reducing the DOF by increasing the blur nearer the focus point. So, a wingtip that is nearer (or farther away) than the focus point is always going to be in less sharp focus. [/QUOTE]
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Autofocus mechanism
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