Hello Cozen,


We have been using a Sigma 10-20mm 1:4-5:6 DC HSM for nearly 3 years now and have had no issues to date. The optical quality is superb for our purposes. We have used this lens for in & outdoor architectural work shooting Hotels, Taverns, Government buildings, Homes and some landscape.


A word of caution though, when using a flash, either take off the hood or use an off camera flash system. I took extensive cave shots with this lens and had the hood on (wanted to utilize the hood as protetion from dripping water on the front of the lens) OOPPPS, bad idea. Good thing they were personal images and not for a client.


Hope this sheds some insight on the choice....


Be safe and happy shooting...