Every camera has extended ISO. In the upper end where the ISO is pushed, I do not recommend using them.
But the extended low ISO is worth testing. In theory, the image quality should be better. The ISO is pulled and the brighter images get darker and that will reduce noise.
Check out the video to see my test on the different Olympus cameras.
Olympus announced the Olympus OM-D E-M1X in January 23rd. In that announcement, they also announced a new flash system with radio control.
The new flash is the FL-700WR. The radio flash system also includes a controller unit and a receiver unit. I had a chance to test the system for a few days.
In the video, I go through the main specifications and the logic of how the system works.