Hello Jörg, and welcome to the friendly Camera Labs forum!
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I know you're looking for a zoom, but...
I'd suggest looking at the Nikon AF 35mm f/2.0D. It sits in the middle of a 24-50 zoom, has a much larger aperture and very nice image quality.
Same holds true for the Nikon AF 50/1.8D.
And both are small lenses!
Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews
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