Not to be outdone by a wave of new product announcements from camera manufacturers this week, Sigma is announcing their new 70-300mm f/4-5.6 DG OS telephoto zoom lens. It aims to offer a powerful zoom range in a compact form coupled with Sigma's OS optical image stabilization.
Sigma claims the OS system offers a gain of four stops. The 70-300mm also plays host to Sigma's SLD Special Low Dispersion glass elements to combat many types of aberration and a Super Multi-Layer Coating that aims to minimize flare and ghosting. The lens measures 126.5mm overall in length and weighs 610g. By combining a compact form factor with use of slower shutter speeds, Sigma hopes to make this a lens photographers will reach for in situations that call for steady handheld work.
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