This is just a "techie" pic showing what a Sigma 50-500 lens can do on Nikon D70. Shot from tripod, with "sweet spot" setting of f16 at 500 mm focal length. Trafic lamp post at about 500 meter (1500 feet) distance. No resizing and no post processing done, except for cropping. In-camera sharpening set at "normal". What happens when you add Sigma 2x teleconverter, check in picture on the left.