Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Review of Sigma 10-20 mm zoom lens for Nikon

I have only used it once on a trip to the Redding Bridge in Redding, CA. It was my primary lens at this spot as there are many possibilities where the wide angle works exceptionally well. It seemed to live up to expectations. It was sharp throughout and reasonably easy to use. The reversed positioning of the zoom control and the focus control was not very bothersome. I appreciated having that really wide angle as an added tool for my D300. The price was reasonable and I had done a fair amount of research on line to decide between the Sigma 12 - 24 and this lens. The Nikon equivalent cost almost twice as much. It's a fairly heavy lens but this betokens that it may be better made than some other lighter wide angle models.