I weent to our local Best Buy and looked a SX50 over also the Sony equivalent. Even though the lighting is plenty bright to get fast autofocus with my 100-400mmL and 5D MK III, the camera would not focus at all when zoomed out to about 10X. The Sony was much worse. I tried on very well lit areas close to the bright lights, ..,.nothing. It did focus up close.
I was underwhelmed, I can't imagine being able to use it except in bright sun, and then AF might take a few seconds. So much for that idea.