men’s watch under 200 Sigma 500mm f/4 DG OS USM S Canon lens review: Super-sharp shooter

The lens features the large f/4 maximum aperture desirable for achieving fast shutter speeds; Sigma’s 4-stop image stabilizer (OS) for shake-free images of relatively static subjects, using shutter speeds as slow as 1/30 of a second; and Sigma’s hypersonic autofocus motor (HSM) for responsive AF performance. read more