(All AF timing tested with the Canon 18-135mm f/3.5-5.6 IS USM kit ... viewfinder with the 18-135mm IS USM kit lens, its full autofocus shutter response was very fast for a mid-range consumer ...

We measured the Canon 77D's optical viewfinder's coverage at only about 93%, well short of Canon's 95% spec, and it was shifted vertically with respect to the sensor as well. Live View mode using ...