This spherical fisheye lens easily captures a full 180° view in all directions in a 22mm diameter circular image. Now even the most familiar subjects can be portrayed with startlingly fresh new expressions through exaggerated perspectives and many unusual distortion effects.4 Year Sigma USA Authorized Dealer WarrantyIn addition to the 1 year international warranty, when you register this EX lens with Sigma you will receive an extra 3 year extended warranty against defective materials or workmanship. Click here to register your warranty »