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这款镜头凭借其在整个28-70mm变焦范围内恒定的f/2大光圈脱颖而出，比常见的f/2.8标准变焦镜头提供更快的通光速度和更浅的景深。其搭载的四组XD线性马达和浮动对焦系统确保了快速、精准的自动对焦性能，适合动态拍摄。它是那些希望用一支变焦镜头替代多支定焦镜头，同时不愿在光圈上妥协的婚礼和人像摄影师的理想选择。
这些产品同样得分很高，可能更适合你的具体需求
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