First impressions.

I am glad to see Sigma have supplied a centre-push/snap-on lens cap to enable the user to remove & replace it without having to remove the lens hood. I have the Sigma 17-70mm F2.8-4.5 DC with the old style lens cap which drives me around the bend as it is impossible to quickly remove and replace it unless you remove the lens hood. 

The lens itself seems well made and is attractive to me at least. The proof of the pudding is in the eating they say so I will find out if the lens deserves its reputation when I use it for the first time tomorrow.