远摄定焦镜头能瞬间拉近远处的景物，不打扰被摄物而获得生动细致的景象，令您享受富有贴近感的取景和绝妙的背景虚化表现，适合体育和野生动物拍摄等题材。做为佳能久负盛名的L系列红圈镜头，佳能 EF 300mm f/2.8L IS USM 镜头采用13组/17片的镜头结构设计，包含1片 萤石镜片和2片UD（超低色散）镜片的豪华配置带来出色的成像效果。IS防抖系统的加入大大提高了手持拍摄的成功率，让您摆脱脚架的束缚，更自由灵活的拍摄。镜头配备USM超声波对焦马达，对焦安静而迅速，表现始终如一。全时手动对焦功能可迅速的改变对焦距离，给您更多自由创作的空间，后对焦/内对焦式的设计使用滤镜时更加方便。使用在佳能APS-C 幅面的相机上等效焦距为480mm，远摄能力进一步提高。
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