This is already the third lens from a tamron with a silver ring in my technopark, and so far my impressions are only positive. According to subjective feelings, the weight and dimensions of this glass greatly outweigh the value of aperture in a similar model 70-200 f2.8, and even more so at such focal lengths, and as a bonus +10 mm focal length at the long end. Even in dark scenes, f4 with a stub is enough. So to anyone who is still thinking - I strongly recommend it!
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