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Message: <blockquote data-quote="nickt" data-source="post: 386871" data-attributes="member: 4923">Af-s focuses once and stops. This makes it easy to focus on a single point and recompose while holding the shutter button half pressed. Continuous focus keeps trying to maintain focus. Exactly how it does this depends on other settings and # of focus points that I won't get into now. There should be no great difference if you used af-c with single point on a still subject. You won't be able to focus and recompose, but both should take a still normal shot ok. There have been discussions on how precisely af-c vs af-s will lock on a single point. Don't worry about it now. Its important to use af-c for action and it is desirable but not absolutely necessary to use af-s for still. If you did use af-c on a still, you would need to be aware of how it works and potential problems especially if using more than one focus point. AF-c in a still shot could do something unexpected in a still shot like jump focus to something in the background.This is where the back button technique comes in handy. When done properly, it gives you instant access to both af-c and and af-s-like behavior. I would suggest holding off on trying back button focus until you are 100% comfortable in using the default methods. Try out back button focus only because you think its a really great idea and have mastered doing it the regular way. have you seen this article:<a href="http://alexdanev.com/forum/Books/nikon/D7000_AF_Explained.pdf" target="_blank">http://alexdanev.com/forum/Books/nikon/D7000_AF_Explained.pdf</a>It's a lot to read, but it's worth reading and studying and keeping it around for reference to learn all the ins and outs of your autofocus.</blockquote>

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