Long-Range 500mm-1000mm f/8 Manual Telephoto Zoom Lens for Nikon SLR C – Big Mike's Electronics
Amazon.com : Super-Powered 500mm/1000mm f/8.0 Manual Telephoto Lens (Black) with 2X Professional Multiplier for Canon EOS Digital SLR Cameras and Deluxe Accessory Bundle with Xpix Cleaning Kit : Electronics