I use this lens with a Sony A58 and it's a great combination. The auto focus is accurate and silent which is great for shooting wildlife. The quality too is awesome - obviously, it needs a steady hand with the correct exposure, etc to bring out the best in this lens (as is the case with any lens), but magnificent results are possible, sharp, lovely colours and smooth bokeh. Not too heavy either when used with a Sony because of the in-camera image stabilisation so, it's a dream to handle. Absolutely no regrets - love this lens to bits and have some fantastic images to prove it's worth.