I've been using Sigma lenses for years and the only one that broke I
dropped onto a concrete floor...
currently I've
105mm macro - razor sharp, works with all my lenses
10-20mm zoom for Nikon dSLR - superb results.
18-200mm zoom for Nikon dSLR - surprisingly good.
AND I can get superb A3 enlargements from them.
I don't know what the construction internally is like, but then I don't
know that about Nikon's own lenses.
Buying Sigma helps to to achieve things I could never hope to do because
Nikon's prices are, for a non-pro, astronomical.
If I had the money I'd buy Nikon, but I'm STILL waiting for Nikon's
18-200 VR lens to appear in the UK.
My daughter has a Canon 70-300 zoom but prefers, for carrying AND
sharpness her basic 55-200 Sigma, even when using a tripod.
It's simply "horses for courses".
Howard
