Hello, it makes one month that I have this goal, I'm happy, it produces beautiful picture. by cons I still sense a difference in the focus 70 (lack of light) otherwise it is well built, well finished, solid. it is quiet and fast focusing, it does not spin once it hangs has all focal lengths. 70 is a focal length is really proxi photo, one is almost stick to the topic. I do not say he is like a macro, but I wonder at the photos proxi, really. for Amazon, I give the 10 stars with their service that reminds us and always ready to serve us and always a solution to the problem. good to return to the sigma. I think the Tamron 17-50 VC 2.8 is brighter and has better bokeh. should not also forget that the Sigma 70 is a focal length. I recently made flower photos, ben he is beautiful to the outer especially when the subject is detach the bottom you have a beautiful bokeh. really great this 17-70
