BMD Pocket Cinema Camera Sigma ART lenses Point 2

I think the newer Art lenses', the iris "moves" continuously without stepping between the value, although you can't stop in the middle. But it is nice. I tested all of the Art lenses and they all work except few of them didn't show the iris value as one stop open but stayed in the same value like F1.4. Older lense like 50-150mm F2.8, was strange one that limited to F4 full open instead.