"This ultra-wide angle lens offers tack-sharp possibilities even around the edges." bhphotovideo.com
"I used it for landscaping with my Canon 5D mark II camera. it is pretty sharp and very-very wide." bhphotovideo.com
"It's well built and feels very solid. It's lighter than I thought. Focus is precise, reasonably fast and silent." bhphotovideo.com
"Very crisp fast focus. Glass is high quality and mechanics are rock solid." bhphotovideo.com
"This is a must have if you are a serious photographer. The images are great!" bhphotovideo.com