The panorama head should be FIXED on a tripod, TO ensure the nodal point of the lens FALLS RIGHT on the rotation axis when the camera turns around. Without the panorama head, the PICTURES taken SIMPLY...The panorama head should be fixed on a tripod to ensure the nodal point of the lens is right on the rotation axis when the camera turns around. Without the panorama head, the picture taken simply with a digital camera and fish-eye lens will have an offset.offset,好点不听起来好点,不过意思还不是很明白.(一般是补偿/抵消的意思)不过专业术语你自己拿主意了.