With their latest two cameras, the OM-D E-M1
and STYLUS 1
advanced compact, Olympus have advanced their EVF technologies.
The electronic viewfinder on the Olympus E-M1 has a 1.3x larger view than the average DSLR, making it great for scouting out possible images with. It also has a magnification of 1.48x (0.74x in 35mm equivalent). It has a 2,360kdot resolution, and a 29ms time lag. That's so short, it isn't visible to the human eye.
The EVF also allows you to alter the aspect of your images, manipulate colours for the first time and adjust brightness to match changes in ambient light, even before you press the trigger and take a shot. It is the only EVF on the market that offers you HDR preview, too.
The STYLUS 1's electronic viewfinder is just as impressive, with a 1.44 million dot resolution and only a 25ms time lag. It has 100% field coverage, outperforming entry level DSLR cameras. The backlight automatically adjusts to changes in ambient light, and you can also preview images with Art Filters.