The swiss arca d4 head combines the best qualities of a traditional ball head and a 3d tilt head with two locking levers one unlocks the head for vertical movement the other horizontal and both levers can be released in order to adjust both axes simultaneously precise adjustments to both axes can be simply made via the geared mechanism and a pair of spirit levels aid accurate alignment for panoramic adjustment the head can be rotated both at the base and at the top of the head with mo