There has been a ton of excitement drummed up around the Sony a9, and today, there seems to be another reason to anticipate the camera's release. A Japanese camera tester posted a video of the camera's eye-tracking autofocus in action, and the results are highly impressive.
Not much fazes me these days when it comes to gear, but this definitely caught my attention. As someone who loves wide-aperture portrait lenses, I've come to accept the autofocus woes that often come with them, meaning I throw away a fair amount of my shots. The beauty of cameras like the a9 is the on-sensor phase detect autofocus, which means no microadjustments (as with SLRs) and (theoretically) AF speeds approaching or eclipsing the best DSLRs. Throw in the eye-tracking you see above and it has me drooling. I found it truly impressive how quickly the camera picked up on eyes in the frame and tracked them very quickly and accurately. If performance like this is consistent, there will be a lot of very happy portrait photographers out there.
If you'd like to preorder the Sony a9 (expected to begin shipping May 25), you can do so here.