Just trying to get my head round the manufacturers' creativity when it comes to specifying contrast. I see that some are using an automatic variable iris to maximise contrast (at least in the spec sheet!). Am I right in saying that this will be a full-on / full-off ratio when fed with peak white and black in turn? With an iris doing half the work it seems to me that you might achieve these high contract figures in theory, but never in the same image frame. Or is the real situation better than this?