yes, i owned one a few years back.it was rather heavy and suffered badly from lens creep. after the lens crept to its maximum it was difficult to retract. i had to disengage AF to do so.optically it was unremarkable. i soon realised that i was much better off using my nikon 70-300vr and cropping if i needed extra reach.on the positive side i have heard that it makes a good door stop.