New Hejnar Photo Long Lens Support Package 2. Package include lens support bracket, 8 inch rail, 2.375 inch clamp(part F62) and mounting bushing. Bracket can be permanently mounted to 8 inch 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 (Second clamp sold separately). If you own long lens with lens foot rail can be mounted directly to the bottom of the foot in best position for balancing purpose. If your lens does not have mounting foot you need to mount clamp onto rail .