Being stuck indoors that past few days I had a little while to do a simple and rather unscientific focus accuracy test. I recently purchased an X-E1 and was wondering how it held up to an SLR and M43. Test procedure: -Set min shutter speed to 1/250 -Set lens wide open -Set to spot focus single (AFS) -Snap pictures of toddler running around like a banshee. No prefocus, just make sure the focus zone was on target and mash the shutter button down -sample set is ~50 pictures each, shot indoors on a mostly cloudy day using available light, most cameras were shooting >ISO 1600 wide open The results - shots completely in focus Fujifilm X10 28mm eq- 18% Fujifilm X-E1 18-55mm @18 - 80% Olympus E-PM2 Pan 20mm - 81% Nikon D5100 35mm - 87% Sony RX100 28mm eq - 89% What was interesting is the Oly never completely missed, 100% were good enough for small prints. I was completely surprised at how well the RX100 did. If I had used AFC, the results would probably be very different as that mode is useless on the X-E1 and I was really trying to see how it did versus the rest of the cameras. That said, the X-E1 is slow slow slow, it might get the shot in focus, but you have quite a delay. The PM2 and RX100 are lightning quick, almost feel faster than the D5100.