Sigma EX 200-500mm F2.8 DG APO

Sigma EX 200-500mm F2.8 DG APO You'll probably recognize Sigma’s APO 200-500mm F2.8 EX DG from photographic tradeshows. The native focal length of 200-500mm is impressive enough, but when coupled with its specially designed teleconversion attachment it becomes a 400-1000mm F5.6. According to Sigma, this lens is perfect for 'fast moving nature subjects and sports such as surfing, polo and soccer', but you will need a tripod. A really really good one.