佳能发布电影伺服镜头新品，系列最长 1200mm 超远摄 + 30 倍变焦
IT之家 4 月 15 日消息，佳能（中国）今日宣布推出电影伺服镜头系列新品 ——CN30×40 IAS J/R1 和 CN30×40 IAS J/P1。 这两款镜头分别配备 RF 卡口和 PL 卡口，在保持便携性的同时，实现了该系列中最长的 1200mm 超远摄焦距和最高的 3
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