I just received this lens yesterday. I took it on a field trip to try it out. If you look very carefully in the shady center of the 18mm photo the is a heffer. That was my focus point. All photos were hand help. At 300mm and 400mm (I ran the photos thru Topaz stabilize. The turned out very good. The black cow in the last picture just had this calf last night. You can still see the umbilical cord attached. This photo was taken about 200 feet away with the subject in the shade. For the first time out with this lens I am very pleased.