« on: May 22, 2013, 01:38:24 PM »
I'm confused by some of these responses and I think you're getting bad information. The AF selection points and AF mode are independent. The expansion points work perfectly fine in One Shot -- it's your personal preference on how useful/effective the extra points are for your shooting needs. For however many point are selected the camera will lock focus on the activated point (or points) it determines is the most ideal candidate based on distance, contrast and whatever other mojo is going on the in the AF chip. I typically use a 9-pt square for focus and if the point lights up off of the face of my subject I just recompose -- I very rarely hit focus on the background. This works great for me when shooting events because I just need to get a point to lock anywhere on face.
For switching modes, you can do so in less than a second on the 5D3 using custom modes...I do it all of the time without missing a beat. Once you get used the the action to switch modes, the dial isn't bad at all. On the 1DX, you have no excuses to complain. Using the custom route as Neuro suggested is nearly instantaneous. You can even tell the camera how many modes to toggle through, so you aren't wasting button pushes. Additionally, and more in line with what someone mentioned with the DOF button, you can assign either of the custom buttons to activate Servo while pushed and return to One-shot when released. I have configuration on my 1DX with the other custom button set to toggle between my current AF point selection and all points active, so i can very quickly expand to all points to catch a moving subject.