Nikon AF-S 200-500mm VR Review & Sample Images by Ken Rockwell
Amazon.com : iShoot Lens Collar Compatible with Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR, Lens Tripod Mount Ring Support Bracket Holder, Bottom is ARCA Fit Quick Release Plate for Tripod Ball Head
Nikon 200-500mm f/5.6E zoom vs. the 500mm f/4E prime lens comparison - Nikon Rumors