I have a Sigma 50-500mm f/4-6.3 EX DG APO HSM - Nikon Fit for sale in good condition with some superficial wear in the usual place only on the tripod attachment / handle. A carrying bag, lens hood and filter is also included. It's called the 'Bigma' by some people. I'm considering upgrading this lens to the newer version of the same but it will depend entirely on whether I can sell this one for a reasonable price. Therefore I'd be pleased to hear from anyone who is interested in buying this lens from me via PM. You'd be welcome to try it out on your camera and I can also send you some pictures via e-mail if required. Please PM me if you are interested. Cheers Martyn