Our search for more sample photos taken with the Sigma 17-70mm f/2.8-4.5 DC Macro has led us to a great gallery of the Minter Gardens by PBase user Alex Tsung. He notes that this lens has much faster and quieter AF than the Tamron 28-75 f2.8, suggesting that Sigma has somehow improved on their typically noisy AF system. Another observation he noticed was the lens closer macro performance compared to the Tamron, just as we have expected.
Photozone also has a review of the Sigma 17-70, predicting that this lens will be a hot seller. I’m a few samples away from buying this one for my D60 as well. ;)