mwsilver wrote in post #17715682
They named them differently because they work differently. The expanded points are only there for assistance
if needed. That was my thought from day one. Some feedback, not from here and not Canon is that the assist points are doing the same thing as in zone. The centre point is just there to start and then basically becomes part of the cluster. The term "mini" zone was actually used.
I've alway viewed it as the centre point is the primary at all times. What Rudy Winston says in that link I posted is how I thought it worked since buying by 5D3 when it came out. Even with the assist points I should always try to keep my centre point on what I want to be in focus.
You really can't avoid doing that because it is such a small area anyway. Then I thought the area is so small what significant benefit will faster switching be? If a small erratic bird takes off in another direction it will off all the points in a micro second. I can't keep up to it. Just by that alone I don't think it impossible the engineers could have decided to set assist points at a fixed speed. Save on resources?
Art Morris may very well be wrong which is fine by me. I'd just like to know. The reason is it will give me more options. I can be in case 2 (my go to for steady object) and instead of taking the time going to case 5 or changing a parameter I can just quickly use the AF selection lever and go to expansion. AF switching is on 0 but it would not make any difference.
Case 2 could be my slower zone tracking setting because zone still works on 0. I know there are a 100 ways to do this but it the assist points are actually fixed it would make a difference to me.
