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<blockquote data-quote="Eyelight" data-source="post: 369492" data-attributes="member: 24753">It's a mix of cold hard facts and perception.&nbsp; The CHF is that if something is moving it will have some motion blur at even the highest shutter speeds.&nbsp; But, we can only see so much detail and if the detail looks sharp, we perceive a frozen subject.&nbsp; If you zoom in enough on any sharp detail, it will get soft, even for a motionless subject.&nbsp; What high shutter speed and/or flash do is capture such a small amount of movement, we perceive and think there is none.Back to the duck, if this is level straight flight, then the near wing is extended toward the camera in the same position as the far wing.&nbsp; In that position the near wing extends farther into the near DOF than the far wings extends into the far DOF, and that is kind of what I see in the blur of the two wingtips.&nbsp; However, almost looks like the duck may be turning away from the camera, and if so, I'm not sure how that affects the wing positions, other than the near wing could be moving in a faster motion.</blockquote>

[QUOTE="Eyelight, post: 369492, member: 24753"] It's a mix of cold hard facts and perception. The CHF is that if something is moving it will have some motion blur at even the highest shutter speeds. But, we can only see so much detail and if the detail looks sharp, we perceive a frozen subject. If you zoom in enough on any sharp detail, it will get soft, even for a motionless subject. What high shutter speed and/or flash do is capture such a small amount of movement, we perceive and think there is none. Back to the duck, if this is level straight flight, then the near wing is extended toward the camera in the same position as the far wing. In that position the near wing extends farther into the near DOF than the far wings extends into the far DOF, and that is kind of what I see in the blur of the two wingtips. However, almost looks like the duck may be turning away from the camera, and if so, I'm not sure how that affects the wing positions, other than the near wing could be moving in a faster motion. [/QUOTE]

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