I've been wanting to add a wide angle lens to my collection for a while now. Sigma 10-20mm f5.6 looks good. I was looking at it about 2 years ago. I was wondering if there have been newer wide angle lenses around the same price range. My budget is $500ish. I'm aware of the newer Sigma 10-20mm f3.5 but it's way over my price range. I have a Nikon D90.
DPReview has looked at both lenses and found them both to be of good quality, albeit with their individual pros/cons. Have a look through the reviews and sample images:
Personally though, seeing as there's so little in it, I'd just get whichever I can find for the best deal! I picked up the Sigma f4-5.6 second hand for £250 earlier this year and have been very pleased with the results.
I got the sigma 10-20 f5.6 several months a ago. And haven't taken it off since. I love the look of the photos, esecially shots of my kid messing around. Also great for interior photography where there isn't much room, although I often need to bounce my speedlite as the lens isn't particularly fast.