Referring to original for optimized, it is more practical than original, with improved detail and added quick board installation function The netweight of replacement foot. According to original factory, the bottom comes with quick installation plate, which is about 90mm long and reserved with 1/4 and 3/8 screw holes Scope of application:for z 70-200F/2.8 100-400mm 400mm lens Using aviation aluminum, precisions machining, surfaces anodizing, spring buckles, knob locking, equipped with stainless steel antislip nails The quick release board adopts AS standards and for standard gimbals