Sharpness is slightly worse than with the Nikon 28-300mm. Minimal but you can see it if you what more must rauszooomen from the image. What did not work, the noise makes the Bildstbilisator. The louder than my focusing beeping my camera !!!! I thought the lens was broken, but according to Tamron this is normal. When Nikon you realize not even that is turned on the stabilizer. Otherwise it would not be bad, because it is super light !! But the noise does not go !!!!