[wim]

I stick with the example although I never drove a Tesla, Lamborghini or other special cars.

 

However, the feature of setting the AF-ON button will effectively lead to blurred images. Less experienced users are used to AF-ON when the shutter button is half-pressed.

 

There are a couple of possibilities I can imagine which leave a less frequent camera user helpless. Some cameras are for that reason equipped with a "green wave", put every switch on green and you're good to go. An Nikon D4 doesn't have much of green buttons and  I replied to this generalsation. Cameras, especially their software based interfaces are far away from any standard even if there are some common symbols liek trashbin, playback and MENU (gateway to hell).

 

A user who is savvy enough to use the AF-ON button surely would tell you either to use it for focusing, or ask you to just press the shutter button, as he/she would have pre-focused already .... .

 

I know I do ....

 

As to the green wave, that is called P-mode on many cameras .

 

Kind regards, Wim