Autofocus speed on X-E2S
I owned an Olympus E-M10 and EPL-5, plus a Panasonic GX7 and GM5. when people asked, I used to tell them that the autofocus is blazing faster; it felt almost instantaneous. Even faster than that, was the Nikon 1 V3 that I briefly owned. Plain and simple, the smaller the sensor and the smaller the lens, the faster the focus.
So, in normal light with subjects that have normal or high contrast; the X-E2S will not be as fast. But, there is a caveat. Those M43 cameras all use contrast detect autofocus, while the X-E2S, like my X-E2, uses hybrid autofocus; a combination of contrast detect autofocus and phase detect autofocus. The result is that the hybrid autofocus is more reliable and will quickly focus in low light or low contrast situations while the pure CDAF system will struggle and may not even be able to autofocus.
“Sharpness is a bourgeois concept”
- Henri Cartier-Bresson -