Originally Posted by Steve Smith
At ISO 100 these numbers coincide. e.g. for ISO 100, an LV reading of 15 means you should use an EV setting of 15.
At ISO 200, half as much light is needed so an LV reading of 15 will require an EV setting of 16.
And since the camera doesn't have an EV setting of 16, there is a problem! Stay in the shade!