I have been to many (including Sony) SLRs - because I was tired of the equipment-smuggling - now a Nikon P7700 with 7.1 times zoom - 6.0 - 42,8mm focal length and maximum aperture of F2.0 -4.0 The still fits into a coat pocket and makes them in the range of 28-200mm in such high-quality photos, which it replaces me an SLR. At my current secondary camera, a Sony SLT A57, I came as a virgin to the child. Short tried, enthusiastically, must have! Which Lens? For my beloved Zoom orgies from 200 focal length, must be found an affordable telephoto zoom lens, because I can not afford as a pensioner no sauteuren fixed focal lengths. From time immemorial, a freak of Tamron and Sigma lenses that build good for the SLT / SLR Lenses -Einsteigerbereich, I tried now but once Sony lenses from. the reason for this? The kit 18-55er "broken lens" something better, it has been at any of my Sony SLR / SLTs, brings a surprisingly good image quality on my A57. So I thought: Try it once Sony lenses from. Because I need something for the range from 200mm, I ordered the Sony SAL 55-200mm and Sony SAL 55-300mm two identical light intensities F4.0 - 5.6 for testing. The surprise: The Sony SAL 55-300mm brings, though it has more 100mm focal length, the far better image quality! I indeed incomprehensible, but it is so. Anyway, on my A57.