佳能正式发布新款EF 70-300mm f/4-5.6 IS USM镜头,其定位为平价L级中远摄变焦镜头。EF 70-300/4-5.6拥有环形超声波自动对焦马达,防水结构,相当于4级快门的防抖系统,最近对焦距离1.2m,尺寸与现有的EF 70-300mm f/4-5.6 IS USM相当。
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