Re: Z7U/ contrast issues

The auto knee feature is the hidden gotcha in the z7U.
It acts as an auto iris for highlights, clamping down anything over 100 and something IRE... I'd switch to manual knee - turning off auto knee, and experiment with different white clip settings... even a grey scale chart and some kind of waveform would be helpful... I use the zebras at 100+ and watch them change as I dial in different levels of clipping/slope/knee level adjustments, - then change the zebras to 100 and see what effect the difference in knee settings give it... this will solve or create problems for you depending on what you do.. - and I agree ALL MANUAL ALL THE TIME. there should be no reason for washed out imagery with all the options for Gamma curves (by the way - some of them actually pull out contrast) some times too many options can get in the way... try a chart and a waveform if you don't believe your eye or want a real numerical interpretation of what all your gamma, black level, knee functions are actually doing. good luck. http://img.diytrade.com/cdimg/344675/7288348/0/1225783931/ITE_Grey_scale_II...

JB

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