AF Smart Controller
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AF Smart Controller

The AF-ON button can now function as a sort of trackpad for your thumb. Once enabled in the menus, you can drag your thumb across its surface to control the AF point placement in both the optical viewfinder and when using the rear screen in Live View. You can fine-tune the sensitivity, and because it's based on optical technology, it even works with gloves if you find yourself in chilly conditions.

In our experience on a pre-production camera, we've found that it works well, but different users have different sensitivity preferences. And, quite frankly, some of us have had a hard time re-programming our muscle memory to avoid just reaching for the AF joystick by default.

We suspect that, with a little practice, it'll be one of the standout features that users will remember this camera for in a few year's time.