This lens is possibly the largest and rarest auto focus lens in the world, it’s the Canon 1200mm f/5.6L USM – the “mother of all telephoto lenses”.
MPB Photographic brought the 1200mm f/5.6L to London and shows us what this lens can do:
[…] how does it perform and just how far can it be pushed? We took the lens to The Mall in London to put it through it paces and to see what Buckingham Palace looks like at 1200mm and beyond.[via PetaPixel]