I've been looking at this lens, but it seems to me that while the reviews I've found so far say it's not bad and fairly sharp:
Here are the reviews (I have found the links in a dpreview forum thread):http://www.lenstip.com/328.1-Lens_revie ... ction.htmlhttp://www.ephotozine.com/article/sigma ... view-19206http://www.popphoto.com/gear/2012/05/le ... -dc-os-hsmhttp://www.dxomark.com/index.php/Public ... super-zoom
I've tried a used Nikkon 18-200mm VR and it's been very impressive, except at the long end, but the front element was had a scratch and it seemed the coating was coming off a bit, so I didn't buy it.
Anyway, does anyone have links to raw samples from this Sigma?
I'm asking because the difference between the samples in jpeg the owner of the Nikkor sent me were so soft that I thought the lens would be no good, but the raw shots I took with it were very sharp between 18-60mm and took me a bit by surprise. I've only found jpeg samples from the new Sigma so far and they were fairly soft, but if I were able to squeeze some extra sharpness out of the raw files....
Has anyone compared the lens directly to the Tamron 18-270 PZD? I've tried the Tamron out in a store and the AF speed just wasn't good enought for me. A little bit slower than the 18-55mm Nikkor kit lens through the range, but not that great when focusing between subject either. The 18-200mm Nikkor's AF has been about 2-3 faster than that of my kit lens.