wiltonwong

Fuji says this about the XT-1: "The improvements mean the X-T1's EVF has a world's shortest delay of just 0.005 second. "

Olympus themselves talk about their OM-D EM1-II: "Olympus's press release contains the following statement: "With high-speed operation that includes a maximum frame rate of 120 fps and a minimum six-millisecond display time lag during shooting, users will never lose track of fast-moving subjects." With something moving 90mph, 6 ms equates to being 'behind' the object's actual position by 9.5". While that certainly will not affect most folks, it can be problematic for others in the right set of circumstances. Track a jet travelling a slow (for a jet) 300 mph, and .006 sec. means you are aiming behind the jet's actual position by 32". There are some compensatory features that help in that circumstance (for the Sony A9: continuous shooting so shutter lag not an issue, no viewfinder blackout) but focus speed drops from 20 fps to 10 fps during continuous focus tracking.