Used NIKON NIKKOR 400mm f/5.6 ED IF AI-S NKL40056I - Adorama
Amazon.com : Nikon AF-S FX NIKKOR 80-400mm f.4.5-5.6G ED Vibration Reduction Zoom Lens with Auto Focus for Nikon DSLR Cameras : Digital Slr Camera Lenses : Electronics
Another hymn of praise for the 400mm f5.6 AIS (2nd image added) and *third*