Rainbowimaging L115 115mm Lens Plate Quick Release Arca Swiss Compat for Canon, Nikon, Olympus, Pentax, Sigma and Sony Tele Lenses (Black)
115MM Lens Plate Quick Release Arca Swiss Compat. Compatible to following lens: Nikon Lens 300MM F2.8 AF-S Nikon Lens 300MM F2.8 VR Nikon Lens 400MM F3.5 MF Nikon Lens 500MM F4.0 MF  Nikon Lens 600MM F5.6 MF; Pentax Lens 300MM F2.8 AF SMCP-FA; Sigma Lens 120-400MM HSM Sigma 500MM F4.5 NON-HSM