I actually bought as immerdrauf travel lens me this lens. The workmanship and quality is good - The result can also be seen. (Alpha 55) Unfortunately disturbs me the really noisy SAM motor and partly. Fokusierzeit relatively long. For this price range (700) me is simply unacceptable. Have the lens so also returned and will buy the 1650 / 2,8er SSM, which is not full frame is suitable, but from the Fokusierzeit and engine noise is not at all comparable. Furthermore, the local Complementary services option is manually at any time intervene in the Fokusiervorgang also very beautiful, which is not possible when 2875er