The Cullmann Magnesit MB8.3 Ball Head with MX445 Quick-Release Platform is an extremely sturdy ball head for any camera/lens combination, including medium format models and DSLRs outfitted with heavy lenses. Specified to support loads up to 66 lb, the Magnesit MB8.3 features a large 2.1"-diameter ball.The MB8.3 head features separate knobs for ball and pan lock. The friction control knob has several convenient "lock-in" positions that enable you to recreate working conditions from shoot to shoot, engendering a measure of predictability that makes for comfortable shooting. The detailed degree scale facilitates precise panoramic and architectural photography.The included MX445 quick-release assembly includes a camera plate and features a well-designed locking system to ensure the security of your expensive camera gear. Two bubble levels tell you whether your shots are flush with the horizon.