Koolertron Gimbal Tripod Head Bk-45 Specialized 1/4" Screw for Heavy Telephoto Lens Camera This Gimbal Tripod Head is a specialized tripod head for heavy telephoto lenses, widely used on wild animals shoots, exotic birds shoots, wonderful sport game shoots etc It is easily to control and very suitable for wide quick capture of the nature animals' moving and running, flying birds, sport game splendid moment.This gimbal tripod allows you to rotate your lens around its center of gravity and thus easily manipulate very large lenses. Vertical balance adjustment lever with a built-in compass.The clamp with quick release of this gimbal head could be moved up or down through adjusting the vertical balance adjustment lever. Adjust the up or down displacement by locking the vertical balance adjustment lever in counter-clockwise direction while tighten the lock knob in clockwise direction is to fix the displacement. Tilt knob.When the mounting plate lock lever is locked, the quick release system could be adjustable for 360 by loosen the upper pivot bearing lock knob in counter-clockwise direction. Lock the quick release system by locking the tilt knob in clockwise direction. Horizontal balance adjustment lever.The base mount could be rotate 360by loosening the panning lock knob in counter-clockwise direction. While locking the base mount by locking the panning lock knob is clockwise direction.