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>With respect to the dog photo this result is a combination of >not filling your AF sensor with your intended target >(according to the NEF the AF sensor is barely skimming the >dog's upper left lead leg, but is mostly on the grass just to >the left of that) and camera shake. In this case the AF >system easily would get confused about what you are trying to >focus on. I also see at 100% quite a bit of motion blur, can >you explain your position when you shot this
OK, i accept that the dog was moving, i was panning... just a bad shot
>(standing/knelling?) and can you think about how you actually >shot and then try and explain it. You would be surprised how >much motion blur you can introduce by simply pressing down on >the shutter the wrong way. I don't know if you need a Lasik >refund, but the grass just to the left of the dog's left lead >leg, and parallel to that point is the most in focus of >anything in the photo, it appears AF thought that is what you >wanted to focus on (understandably as most of your sensor was >on it), although some camera shake is still evident there.
"not filling your AF sensor" doenst the 21 Points in the AF-C pretty much cover that whole area?
>As for your son skating, again, according to the NEF your AF >sensor is actually completely covering the ice between his >right hip and hand, just in front of the blue line.
How did it lock onto white background (down and left of center)? Rather than the moving target in the Center of the Picture? Clearly, he was in the center of the Frame, and of the 21 Points, it picked one not on the kid at all
>As your aperture is only F/1.8 and your AF point is quite a bit behind >your son, it is not surprising that your son is pretty much >completely out of focus here.
Yes, given the point it picked, true, but why that point?
>The blue line to his right looks sharp, parallel to the AF point. I don't think AF-C 21 >point dynamic is the preferred AF mode for a shot like this >BTW. Unless your son is a particularly fast skater, if you >used AF-S and set your AF sensor right in the middle of his >chest you would have gotten a much better result (centering it >over his face probably would get an even sharper shot of what >matters, his eyes). Were you aiming for his hand or did the >dynamic AF choose your AF point for you?
I did not pick his hand. AF Chose that point.
>I am struggling to figure out why the AF is so off of the target. > >Finally the shot of your son at the boards, it looks like you >hit focus around his right hand. There is no NEF (the linked >file is just the EXIF data) so I can't confirm this.
Sorry, its linked here now, you can see that he is not in focus, and not moving, neither was I. and the FOCUS point was dead on his chest.. Might have been better if i picked his face, but this shot should have worked https://docs.google.com/leaf?id=0B3NVrviAhwmxNGJlMzU3MTItMWMxOC00YjJkLWJlOGYtMDg1NmY4MTQ2MmE2&hl=en
>I also don't think AF-C is the proper AF mode here, AF-S and >centering your sensor over your son's face would have produced >a much better result.
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