"Tri" to Challenge-Innovative Triangular Column: The ST tripod includes a triangular carbon-fiber center column that successfully challenged the classic round shape. This unique triangle shaped center column allows for a more compact design as well as a sturdier center section. Waterproof Leg Locks: Manufactured with waterproof structure and material, the locking mechanism seals the legs completely to prevent water, dust and small particles from entering the legs when shooting in tough environment. Born for Mirrorless Cameras: ST series tripods are especially designed for mirrorless cameras with tailored large leg diameter of 26.5mm/1.04inch and compact size.Non-slip Retractable Spikes: Rubber tripod legs with retractable spikes are designed to enhance the stability and can adapt to various shooting environment. Convertible Center Column for Different Working Height: With a reversible center column, the height of the ST series tripod is flexible to meet different shooting needs. Carbon Fiber Construction: Lightweight and strong carbon fiber sections provide the ultimate stability for your camera. The large leg diameters enhance the strength of the carbon layers. VA-5 Fluid Head: Adopting durable high-density aluminum alloy and hard anodized forging process, VA-5 is solidly constructed with large load capacity.