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)。

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Aperture Priority Mode is a great way to control depth of field as it will ensure your images are well exposed.

这个半自动的模式是控制景深并保证良好曝光的绝好方式。

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Additional tweaks include a manual volume adjustment (as opposed to the automatic gain the cameras usually employ), a brightness or RGB histogram display (this function, like some of these other features, has been available for a while as a hack), shutter and aperture priority modes have been added for movie shooting, and the audio sampling ramp has been bumped from 44.1KHz to 48KHz.

ENGADGET: Canon EOS 5D Mark II firmware 2.0.3 arrives at last to free us from frame rate hell