Idiot question alert - 52 focus points

Started Jan 2, 2014 | Questions thread
christophorosp Regular Member • Posts: 233
Re: Idiot question alert - 52 focus points

paul2009 wrote:

hmm. So is it that with numerous AF points the camera takes an average? What is the advantage of having so many AF points? Surely, in the end, the camera only focuses on one part of the field?

Freedom of choice. Explaining:

1. Single AF selection: As mentioned, its much preferable to choose the AF point closest to your choice of focus spot, than choose center and recompose; minimal plane shifting = greater desired sharpness.

2. For dynamic AF you can use various AF-point groups according to the situation and mostly subject speed. Dynamic AF is used in case of moving objects (like in sports photography) and is used in conjuction with the AF-C mode. In Dynamic AF, the camera uses complex algorithms to track and predict the movement and alter the focal plane accordingly.

You can ofcourse use dynamic AF for still objects but in most cases it will be a hit-and-miss.

Im sure Nikon manuals have much more info in regards to the subject.

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