The vanguard alta pro 253cb 50 tripod has unmatched flexibility and stability that enables more angle possibiliities than ever before with its lightweight carbon fiber legs the alta pro 253cb 50 is popular for those who need extreme flexibility minus a heavy weight rrthe instant swivel stop n lock issl system securely repositions the central column in one simple movement in just a few seconds while maintaining the tripods balance and stability with its innovative multi angle center c