Used tripod a few times so far for birds in flight, works great and love the way the Wimberley WH200 Gimbal head attaches and removes w a few turns of tripod collar and release clip.Used w 300mm f/2.8 smooth as silk and would image could support the real big Glass!! Only con is tripod legs collars will unscrew to far and leg will fall off if your not Conscious of this, no real issue if you realize this is possible. Would recommend XLS model if your over 6’.2” in height, otherwise great product and would replace if lost or stolen!