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Aug 22, 2015 at 11:54 comment added mattdm @JohnThomas That review doesn't test the different single AF points, just single point against multiple.
Aug 21, 2015 at 6:52 comment added John Thomas @dpollitt: For the said camera (Pentax K-30) the AF mode with 1 (one) center point is really 'the best'. See the proof at pentaxforums.com/reviews/pentax-k-30-review/… when you scroll down at 'Truck test' paragraph. You have there the AF modes compared in a 'Hit/Miss' table. Besides that, all nowadays top-of-the-line Canon cameras have the center points - 5 (five) for 5D3 and 1DX and 1 (one) for 6D and 7D2 - much more sensitive than other AF points. They start to work from F/2.8 have a double-cross (Star) pattern, -3 EV sensitivity etc.
Aug 20, 2015 at 23:21 comment added dpollitt I'm not sure the center point "is the most sensible" nor that it "will nail focus the best". What sensitivity and type is the center point vs the rest? How can this be applied to other cameras? I think you are missing some important detail here to support your claims.
Aug 20, 2015 at 18:45 comment added mattdm Focus and recompose can move the plane of focus more than you might expect. This probably outweighs any increased sensitivity of the center point.
Aug 20, 2015 at 8:40 history answered John Thomas CC BY-SA 3.0