The Photo Clam (not a typo) PC-40 is a mid-sized ball head that Photo Clam (not a typo) claims will support up to 77lbs. Will it? I don’t know, because nearly no camera and lens combination weighs 77lbs. Will it hold your average big camera-and-big-lens combo? Yes: this is a pretty solid piece of equipment. A couple of cosmetic scuffs, good locks. Compatible with Arca-style plates (not included)