Setting proper exposure is really the touchy issue. I used to leave the iris on automatic and use the viewfinder as reference. A few accidents later, I revised my strategy by turning on the zebra and reducing the iris to a point where no zebra bars appear on the faces. However, this is where the confusing part begins. You can always keep reducing the iris until no zebra bars appear anywhere in the scene. The range is quite large. So one needs to have a policy on where to set the iris. Once the faces are properly exposed, where do I go from there?