Benro PC0 Panoramic Head Description. The Benro PCO Panoramic Head offers a strong & smooth 360-degree rotational panning mechanism which is fully calibrated & compatible with the universal Arca-Swiss QR system. Not only does it provide quick easy movement but it also helps to control your camera more accurately. Features include the built in bubble level to check alignment the quick release system to remove your camera quickly & the knob on the side to effortlessly secure your camera in place