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【佳能再曝多款RF卡口F2.8镜头专利】近日，佳能再度公布了几款RF卡口镜头专利，根据专利描述，新头分别是12mm、 14mm以及20mm超广角镜头，光圈均为F2.8。除此之外，佳能还带来一枚RF卡口的百微RF 100mm f/2.8L IS USM Macro，放大倍率1:1.4x
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