Fixes a phenomenon in which the aperture exhibits abnormal movement when shooting movies in manual exposure mode and aperture Priority AE (Av mode) using some Canon lenses (such as macro lenses).
修正了相机于手动或光圈先决模式拍片时，镜头光圈出现异常动作的问题(如微距镜头)。
The mode of AV connection was found to be of three types:5 cases, common inlet, 1 case, single inlet and 11 cases, double inlet .
房室连接有三种类型，即共同流入心室5例，单流入心室1例，双流入心室11例。
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