CP+ 2017: Hands-on with Sigma`s newest lenses
(Digital Photography Review)

Hands on with Sigma`s four new lenses  Sigma announced a whopping four new lenses at CP+ 2017, in Yokohama, Japan. As soon as the show opened to the press, we headed straight to the Sigma booth for some hands on time. Three of the lenses announced are part of Sigma`s high-end `Art` series including the 24-70mm F2.8 you see above, as well as a 135mm F1.8 and a 14mm F1.8.   Sigma also announced a 100-400mm F5-6.3 DG OS HSM lens which is part of the company`s more modestly-priced `Contemporary` series. Click through the gallery for hands on photos of each lens and some initial impressions of build quality, size and weight.  Sigma 24-70mm F2.8 DG OS HSM Art The Sigma 24-70mm F2.8 is surprisingly lightweight (for an Art-series lens) and reasonably compact. Here it is shown with the focus set to 24mm. Build quality seems excellent andthe 24-70mm F2.8 is weather and dust-sealed, with rubber gaskets visible on the mount. It is constructed from metal and `thermally stable composite` material. Sigma 24-70mm F2.8 DG OS HSM Art The lenses extends a couple of inches when zoomed in to 70mm. Here you can see some of the switches on the lens barrel including the manual/AF toggle as well as a switch to engage and disengage the image stabilization.  Sigma 24-70mm F2.8 DG OS HSM Art The 24-70 F2.8 Art has a minimum focus distance of 0.37 Meters. It also feature a 9-blade circular aperture. Optical construction includes three SLD and four aspherical elements.  Sigma 135mm F1.8 DG HSM Sigma also announced a new telephoto prime lens. Like the 85mm F1.4, the 135mm F1.8 DG HSM is a big lens, and pretty heavy too - weighing in at 1130g/40.2oz. Sigma 135mm F1.8 DG HSM The 135mm F1.8 offers a minimum focus distance of .875 Meters (2.8 feet). It uses a hyper-sonic motor to focus, which Sigma says should result in fast and `exceptionally ...