The large aluminum turn dials let you control iris and master black for 4 cameras at the same time. You can even fine-tune the parameter by pushing down on the dial, to enter fine adjustment mode. You go back to coarse control by pushing it again. The broadcast quality push buttons let you autoroute the selected camera to a specific ATEM AUX channel so you always get a full size image of the feed you are adjusting. They even let you group cameras so you can globally adjust settings simultaneously, relatively from their original position. For iris control with B4 lenses, we have developed the ETH-B4 Link box that let you control iris directly from the ATEM CCU Lite controller.
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