Originally posted by jgredline Andi, What program did you use to correct the images? They look great.
Thanks Javier, I used Photoshop CS4 myself, but I think there should be other (free) ways to correct it as well... Like you I enjoy the 10mm distortion when it looks nice, but for architecture shots it just needs to be corrected
And just FYI for Sigma 10-20 to-be-purchasers, from my personal experience at this focal length, even an unsharp image can look great when sized down... try quoting my previous post and scroll down and click on the third image (the imgwide script will not work and you'll see a 1:1 image), and you'll see that that image is actually super soft, but looks great when sized down. The other two that I posted are great though, so I suspect that in this case it's camera shake from people opening doors behind me, check your copy carefully after buying!
Another tip is if you get a great copy that back/frontfocuses (like mine), ask seller for discount and consider just keeping it, since it's so easy to achieve hyperfocal with this lens and manual focusing is quite a pleasure (best out of all my AF lenses). As per another forumer's suggestion, if you leave it at 10mm, f/8, and focused at 1m, everything from .5m to infinity will be in focus. Since I mostly use this lens for architecture, AF is not an issue (and can sometimes be a hindrance), so YMMV