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Message: <blockquote data-quote="Fred Kingston_RIP" data-source="post: 803239" data-attributes="member: 10742">Let's discuss what BBF is supposed to do and the reasons it was devised... Historically, AF-S and AF-C were managed by a switch... You had to physically use the switch to change between the two modes... You're out doing some landscape shooting and you're in AF-S mode because you want control over the focus and you're shooting still stuff... and suddenly up pops a couple of birds flying across your view... THAT's not the time to be fumbling with that silly little switch... BBF is the solution... Technically, you set the camera for BBF and AF-C... That gives you both AF-S and AF-C control with a single Focus button... If the camera is in AF-C mode, and you press and release the AF button once, the camera focuses and when you release the button, it stops focusing on that point... effectively being in AF-S mode... <-- at that point, if you press the shutter release, you DON'T want the camera to refocus... you just want a release... Same the other way... those birds are just drifting across in front of you, so you press AND hold the focus button... and as long as you're holding the focus button with your thumb, the camera is in AF-C mode continuously maintaining focus on the birds...and you simply reach over with your forefinger and press the shutter...There are some slight differences because Nikon did NOT develop BBF... Photographers worked out it themselves... You won't find a NIKON document that references or tells you about BBF...If you like that little LOCKED red square and the little beep because, like me, I can't see if I'm in focus, thru the viewfinder...You won't get that in AF-C... It's only present when the camera is set to AF-S...</blockquote>

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