外观精美大方，操作简便，通过环绕镜头的同轴冷光源导光，自动供给最佳照明，令皮肤检测更专业，效果更清晰。

Easy to operate, through the coaxial cold light source surrounding the lens light guide, automatic supply of the best lighting, so that the skin test more professional, the effect more clearly.

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佳能给这支专业大光圈长变焦镜头的升级在外观上看没什么区别，但是内部的升级让它的画质基本上处于同类镜头中的最佳水平。

Canon's update to its professional fast telezoom may look much the same on the outside, but internally it's been updated to give image quality that's quite simply the best in its class.

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