The compact professional SLIK PBH-525DS and 424DS ball heads have Arca-Swiss compatible quick release systems for mounting the camera. The low-profile Arca-Swiss style comfort grip quick release plates are thin enough to left on the camera at all times and will not hinder vertical shooting. The ball heads have capacities of 8.8 and 6.6 lbs respectively. Both heads are capable of handling a full sized professional DSLR with standard lens. In addition to the standard easy grip ball lock lever these heads have a tension adjustment knob to fine-tune the drag on the head. They also have a separate panoramic lock with degree marking around the base so that once the ball is leveled or placed at the desired angle the head can be turned a known number of degrees for taking photos to stitch together for panoramic photos.