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The D90 has three different autofocus modes. In the AF-S mode it will not shoot until it has focused. In the AF-C mode it will shoot when you press the shutter release button even if has not focused. In the AF-A mode the camera switches between the AF-S and AF-C modes so either can apply.Also, bear in mind that the camera doesn't really know what you're taking a picture of. It may focus on something other than your subject. If you're in the single-area AF mode then you control which of the eleven focus points the camera uses. In any of the dynamic-area AF modes the camera decides.For full details on how the various modes work, please consult your manual. You might also check out the Nikon D90 video tutorial.
Nikon F mount (with AF coupling & AF contacts)
• D-type / G-type AF Nikkor (except IX-Nikkor): Autofocus and all functions possible • PC Micro-Nikkor 85mm f/2.8D: Usable in Manual exposure mode • AF Nikkor other than D-type (except AF Nikkor for F3AF): All functions except 3D Matrix Metering possible • AI-P Nikkor: All functions except 3D Matrix Metering and autofocus possible • IX-Nikkor: Cannot be used • Non-CPU: Usable in Manual exposure mode (exposure meter cannot be used) Electronic Rangefinder usable with lens with maximum aperture of f/5.6 or faster.
On the D7000 you need to press the button on the side of the camera that's in the middle of the AF/M switch and then you use to switch to decide whether it's in 1 point autofocus (hence forth called AF), 9 point dynamic area AF, 21 point dynamic area AF, 39 point dynamic area AF, 3D tracking AF or auto area AF. If you need more help with switching AF modes let me know and I can help you out =)
Try checking C.Fn III, 3: AF point selection method. Yours might still be on option 2.
0: Normal - Works by pressing the AF Point button and then the Multi-controller.
1: Multi-controller direct - Press the multi-controller to directly select an AF point (without first having to press the AF Point button). Pressing the AF button reinstates all AF points for auto AF point selection.
2: Quick Control Dial direct - turn the Quick Control Dial to select AF points. In this mode, AF points will not be displayed on the LCD panel.
you cannot see all 51 AF points in the viewfinder. The purpose for this is not to block your view of the actual view. But the AF points are there. Just press the multi selector button to move the AF points around
Hi taylorrm, I don't know if you have a solution to this but sometimes the AE-L/AF-L but gets pushed which is the auto focus lock button then the shutter release button cannot be used to focus and yu have to reset by pressing it again. Even though it's confusing at first it's a feature along with the AE/AF Lock to try out to lock your focal area on a subject prior to shooting.
check to make sure the switch on the camera body is switched to AF instead of M mode(looking at the front it's on the lower right hand side below the lens release button), which sometimes happens when changing the lens - so then the mode selected is in P,S,A, or M modes on the mode dial. happy shooting,
Perhaps you're doing something wrong or skipping a stage in the configration. You can find the exact way to change the AF area here:
Hope this solves your problem.
There are four focus modes: S-AF (Single auto focus), C-AF (Continuous auto focus), MF (Manual Focus), and S-AF/MF (Simultaneous mode).
(SINGLE Auto Focus): Focusing is performed once when the shutter button is pressed halfway.
C-AF (CONTINUOUS Auto Focus): The camera repeats focusing while the shutter button is pressed halfway.
(MANUAL FOCUS): The function allows you to manually focus on any subject while looking through the viewfinder.
SIMULTANEOUS USE of S-AF mode and MF mode: You can fine-adjust focus manually by turning the focus ring after AF is performed in the S-AF mode.