One of the features of the Z2 is supposed to be the Iris to help improve contrast .. on my Draper Onyx 1.2 gain fixed-frame it utterly kills the image, it becomes dull, lifeless and muddy. The improvement in black is noticeable but not exactly stunning and the loss of vitality makes it useless to my eyes. I tried re-calibrating with the iris closed using Avia and to my surprise I ended up with nigh-on the same settings for Brightness and Contrast as I did with the iris open. I'm bemused as to why Sanyo bothered. Is my screen not up to making it useful, do you need a higher gain to make it worthwhile?