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<blockquote data-quote="WayneF" data-source="post: 288441" data-attributes="member: 12496">I never get it though..&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />&nbsp;&nbsp; Seems to me the primary goal of what it has to do is to recognize the subject so it can follow it, and&nbsp; then continue focusing on said subject regardless of where it moves. There would be no point of recognizing which focus point had the subject, if it did not also focus.&nbsp; So the focusing seems a given, the recognition seems the toughie.&nbsp; &nbsp;&nbsp; Reading around, 3D tracking seems to be primarily a color recognition system, continuing to recognize the subject by its color against the background.&nbsp; Nikon manuals say:&nbsp;&nbsp; 3D TrackingWhen the shutter release button is pressed halfway, the colors in the area surrounding the focus point are stored in the camera. Consequently, 3D tracking may not produce the desired results with subjects the same color as the background or that occupy a very small area of the frame.But that raises the question, what do the other menu choices do, and why?&nbsp;&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="WayneF, post: 288441, member: 12496"] I never get it though.. :) Seems to me the primary goal of what it has to do is to recognize the subject so it can follow it, and then continue focusing on said subject regardless of where it moves. There would be no point of recognizing which focus point had the subject, if it did not also focus. So the focusing seems a given, the recognition seems the toughie. Reading around, 3D tracking seems to be primarily a color recognition system, continuing to recognize the subject by its color against the background. Nikon manuals say: [I]3D Tracking When the shutter release button is pressed halfway, the colors in the area surrounding the focus point are stored in the camera. Consequently, 3D tracking may not produce the desired results with subjects the same color as the background or that occupy a very small area of the frame.[/I] But that raises the question, what do the other menu choices do, and why? :) [/QUOTE]

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