An annoying feature of the new wonder machine is “Power Saving Mode” in that when using the LCD or EVF in normal mode after about 10-15 seconds of viewing but otherwise inactivity, the EVF and LCD go into power saving mode and the refresh rate is halved and the view becomes a bit jittery and jerky as the screens then struggle to keep the smoothness of the usual operation! Press a the shutter halfway or the back focus button and the smooth operation returns for a short while Apparently this is a feature not a fault as Fuji UK support informed me! also this feature happens on the X-T2 as well, this phenomenon doesn’t happen in boost mode. Fuji UK promised to pass on my comments to Japan. I never noticed this on my X-T2! Hopefully a firmware update will give the opportunity to switch this feature off.