Need help with focus

[soLoredd]

I noticed today that all 5 of my photographs came out with the focus on one individual - blurring others in the composition. Why is this? Is my focus point incorrect? What is the technique for getting the entire picture sharp?

This was shot at f/8, which I assumed would be enough for a tack-sharp photo. Obviously, it's user error but what did I do wrong?

 

[Ryan1524]

I think she moved. Just burst a few frames, should help you in getting good shots. If you look at her shirt, it's perfectly sharp. and with f8, you're right, she Should be sharply in focus.

 

[toxic]

seems like motion blur, but the image is a little too small...

do you still have the EXIF?

 

[wheelhot]

f/8 should be good enough, what was your shutter speed?

 

[FF_productions]

It's a low shutter speed for sure, she may have twitched slightly...post your EXIF so we can get a definitive answer. Heck at F4 I think both would be in focus (Don't quote me on that).

 

[Rockies Photo]

seems like motion blur, but the image is a little too small...

do you still have the EXIF?

I agree. This image looks like Motion Blur, not a focus issue. DOF is relative to distance to subject. F/8 is more than ample, to have these two people in focus. I usually shoot at 2.8/4/ or 5.6 at the most, when shooting people. Definitely, let us know, what your settings were.

 

[soLoredd]

Going back and looking at the EXIF, I believe you guys found my answer.

f/8, 1/6, ISO 800, 42mm

Motion blur had to have been the issue. Guess I need to invest in a SpeedLite