Amazon.com : iShoot Lens Collar for Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR, CNC Machined Lens Tripod Mount Ring Support Bracket Holder, Bottom is ARCA Fit Quick Release Plate for Tripod Ball
Nikon Nikkor AF-S 200–500 mm f/5.6E ED VR review - Introduction - LensTip.com
Nikon 200-500mm f/5.6E ED AF-S VR Zoom NIKKOR Lens, USA w/Free Accessory Bundle 20058 NK