200以上 sigma 17-70mm f2.8-4 dc macro os hsm 277873-Sigma 17-70mm f/2.8-4 dc macro os hsm
The Sigma 1770mm ƒ/284 OS "C" employs Sigma's HSM technology, which allows for fast and quiet autofocusing Indeed, the lens was able to focus between infinity, closefocus and back to infinityA revision to the 1770mm F2845 DC Macro, this lens uses a different optical formula (2 additional elements) and provides a generally faster aperture at most focal lengths compared to the originalIt also contains Sigma's Optical Stabilization technology that can provide up to a 4stop stabilization advantage Lens Construction 17 Elements in 13 GroupsSigma 1770mm f/284 DC Macro OS HSM Handling and features Being only 8mm long and with a diameter of 79mm, this lens is reasonably compact for a a lens sporting an f/28 aperture at the wide Sigma 17 70mm F2 8 4 Dc Macro Os Hsm Lens Review Tourspecgolf Golf Blog Sigma 17-70mm f/2.8-4 dc macro os hsm