In looking/using in the past, I've noticed a few VISCA-controlled PTZs that "manual iris" is really a +/- adjust on the auto *or* there's a menu or DIP switch option to change it between a +/- and true manual. Now that I think about it, I think there's actually a setting on our controller to change the control mode...
Do you know if the USB (or other) models can be used with a software controller or do you always need their control surface?We've got a couple PTZOptics 20x SDI's in here, and they're decent; they blow out on highlights a bit if you don't light *for them*. They're supposed to have manual iris, but I think ours need a firmware update, cause the knob for that doesn't seem to adjust anything.
They're not horrible for $1600, but I'd have preferred a bit better.
They have 12x and 30x models too, and USB/HDMI out depending on your needs.