500mm -1000mm f/6.3 Telephoto Lens + 2x Teleconverter lens for Sony A Mount A700 A850 A900 A200 A330 A550 A500 A450 A350 - AliExpress
Is Canon Working On a Smaller, Lighter 1000mm f/5.6 Super Telephoto Lens? | Shutterbug
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
Amazon.com : High-Power 500mm/1000mm f/8 Manual Telephoto Lens for Canon EOS 80D, 90D, Rebel T3, T3i, T5, T5i, T6i, T6s, T7, T7I, T8I, SL3, 60D, 70D, 5D, EOS5D IV, 6D II, 7D
500mm f/6.3 Telephoto Lens + 2x Teleconverter lens 1000mm for Nikon Canon Sony DSLR Camera and Macro 4/3 Mirroreless Camera - AliExpress
500mm (w/ 2X- 1000mm) f/8-32 HD Preset Telephoto Lens for Sony E-Mount Digital SLR Photo Cameras - Walmart.com
JINTU 500mm/1000mm f/8 Telephoto Camera Lens Manual Focus Compatible w – jintuphoto