十多年前有朋友Sigma鏡頭出毛病，他拆開後發現一個齒輪裂開了是塑料的, 由此印象中適馬塑料，現在應該改進了

來源: 酒仙橋2 於 2023-08-14 14:32:20 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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