Manfrotto XPRO Centre Ball Head w 200PL Plate Wide Angle it blocks out extraneous light it blocks out extraneous light and reduces flare and ghosting The rapid column slides freely and quickly in the tripod shoulder and is locked and unlocked via a simple twist mechanism offering the same strength and solid locking under heavy loads XPRO Ball Head features a new triple locking system which guarantees camera position stability avoiding drifting thanks to three wedges which enclose and block the sphere Moreover its new polymer rings have substituted that unpleasant messy grease ensuring smooth accurate and less jerky camera movement