Sigma 18 - 50 / 2,8 DC /EX/ASP./IF / Macro

I bought this a few months ago to replace my standard Nikon 18-55mm VR 'kit' lens. First used it on a Nikon D80, now a D200. Plus points: Very sharp and crisp, fast + bright (large 2.8 aperture), solidly built, internal focusing, lens hood Minus...

stunning lens! compares favourably with Nikon 17-55 28. this sigma lens is quite quick to focus, lightweight and very sharp even at full aperture

For a medium quality consumer lens, the Sigma offers outstanding optical performance, and respectable build quality. I have owned and/or tested four samples of this lens, and although none was a bad lens, they did vary in optical quality, as Sigma's...