(From Sigma lens literature) The Sigma APO MACRO 150mm F2.8 EX DG OS HSM is a large aperture medium telephoto macro lens which incorporates Sigma's original Optical Stabilizer function. The ...
"Successor to the APO Macro 150mm f/2.8 EX DG HSM ... A floating focusing system moves two different lens groups in the optical path to different positions. This system compensates for astigmatic ...
(From Sigma lens literature) The Sigma 150-600mm 5-6.3 DG HSM OS Contemporary was created around the concept of maximum portability meets utmost image quality in a variable aperture hyper ...