Specifically designed to fit monster sized lenses like the 400mm f/2.8, 500mm f/4 and the 600mm f/4, this 7 inch long Arca-Swiss compatible lensplate gives you loads of fore/aft adjustment to balance your camera and lens.\n\n- Hard anodized black finish\n- Double-dovetail design enables use of our Quick Release flash brackets (requires 3/4" of lensplate exposed past your lens foot)\n- 3 Mounting screws for achieving multiple fit options on larger lenses\n- Two 1/4"-20 captive screw, 1 centrally located 3/8"-16 captive screw\n- 2x Safety-screws\n- 5/32" and 3/32" allen keys