Cheetah surveying the crowd... since most of the zoo residents were taking it easy, the chetahs had big crowds today. These photos were all part of a lens test of the Sigma 120-400mm f/4.5-5.6 OS HSM. A fairly long, lens with optical image stabilization. Today I tried to determine if the lens is a keeper. Overall, I was impressed. The next step is to make some large prints from today's shoot.