It is most evident while sprinting both in 1st and 3rd person that the screen shakes back and forth slightly. Unfortunately this is enough to cause motion sickness for my wife within 10 minutes, making the game unplayable, and there appears to be no option to eliminate the shaking. In the player configuration file (ending in _settings.DayZProfile), I've set 'headBob=0' but the shaking persists. In Arma 3, there is an additional option in the player config file (ending in .Arma3Profile) for 'screenShake=0' which doesn't seem to be a parameter for DayZ PC. Granted the two engines are now different, they have the same root, so hopefully enabling a config option to disable the screen shaking in DayZ PC is trivial to do.