That's ridiculous. If you can't learn how to use the 1D4's AF system then you probably shouldn't be playing with professional sports bodies. It's complex, sure, but it's not rocket science. If you think the 1D4 is too complex to effectively learn how to use, then you're probably completely baffled by the computer you're staring at right now.
The problem is that Canon does not effectively explain what the complex custom functions do in the manual and in some cases the manual is contradictory. With the Mark III, Canon had to publish an additional guide because the custom functions were so confusing even professional photographers regularly argue over what they do. Furthermore, Canon added new functions that depend on other functions or even worse conflict with the purpose of other functions. It's not rocket science -- Canon's AF system is not any form of science.
The best example of this is C.Fn III-4: AI Servo tracking method. The manual starts off by saying that if the camera is tracking something and something else gets in the way, III-4 will determine what the camera will attempt to focus on. Canon tries to make it simple saying that setting it to '0' will always make it focus on the closest subject while setting it to '1' will always make it continue to track what it was tracking.
But wait! What about C.Fn III-2 AI Servo tracking sensitivity? Doesn't
that have any effect? Well, Canon tried to explain this in the "How C.Fn Groups III-2, 4, and 8 are Related" section of the "Guide to AI Servo AF Custom Functions" publication which Canon didn't even bother to include with the camera. This section has a table of various functions, their settings, and a footnote because even the table wasn't complicated enough to explain them.
In this table is your scientific answer: "Sensitivity is emphasized less than AF point switching to the main point".
So tracking sensitivity is "emphasized less". What does this mean to the photographers whose cameras are having trouble tracking their subjects? It means they have to guess what it means because even Canon couldn't quantify it exactly. Hey, maybe changing the sensitivity will help. Maybe not. Even Canon doesn't know.
And just how dedicated is Canon in educating their customers about the "completely redesigned" AF system in the Mark IV to avoid a repeat of the Mark III confusion?
- Again, they did not include the "Guide to AI Servo AF Custom Functions" with the camera. Anyone who wants the Mark IV version of this publication (assuming they heard it exists) needs to Google the Internet to find it. I found it on someone's blog!
- Canon didn't change one damn confusing word in the AF Custom Functions in the manual they do include with the Mark IV, the very same terrible explanations that prompted the publication of the Mark III AF guide two years ago! In fact they didn't correct the C.Fn III-4 section's "Any closer subject appearing in the picture" phrase in the Continuous AF track priority" section. "Picture" should be "enabled focus points".
They don't care!