New Hejnar Photo Long lens support bracket. It can be used in combination with various long rails to improve stability. Rail need 1/4-20 taped hole on end or 90 degree block connector may be needed. Please check my store for 90 degree connector. It can be permanently mounted to rail if you are using only one lens or can be mount inside clamp if you are using it with various lenses and need to adjust height quickly. If you own long lens with foot rail can be mounted directly to lens foot.