The extension arm makes this tripod unique and outstanding. The legs can be spread so the camera is just inches from the ground and the extension arm can be extended so it clears the legs. This allows the camera to be closer to the subject without the legs being a limitation due to a rocky or uneven ground surface. The weight is substantial so its not a tripod that will be backpacked on long hikes but it will perform in an outstanding manner where it can be used. The legs and extension arm are locked and unlocked with a single lever so it is easier to setup without a camera attached. I researched many tripods and think this was an excellent choice.