johnnyliu wrote:
請問這個資料從何得知呢?
5D 2 錄影是 30fps 這不是代表了他的電子快門是 1/30 嗎?
從 5D 2 說明書中只提到他的 ISO 值會自動從 100 ~ 3200 調整
我查了一下,出處是在這個討論區
www.dvinfo.net
節錄段落內容:
The AE adjustment order is ISO (gain), followed by shutter speed, followed by aperture.
The idea behind this is that changing the ISO is an electronic function which does not generate audible camera noise, so it is prioritized as the first parameter to be adjusted by the AE function. Shutter speed is next, but HD video recording in the 5D Mk. II is limited to a narrow shutter speed range of just 1/30th sec. to 1/125th sec. Finally, the aperture is changed only as a last resort due to the physical noise generated by the camera's mechanical iris blades (heard as a series of clicking sounds).
然後,有人把他翻譯了一下
www.dvworld.com.tw
節錄翻譯內容:
無敵兔的曝光調整順序是先調ISO(GAIN),再調快門,最後才調光圈
如此設計的主要目的是儘量減少相機的機械噪音被錄音收錄進去
所以先調整由電子控制不會發出噪音的ISO(GAIN)
再來調整快門,但快門可調範圍限制在1/30~1/125之間(好賊的CANON)
最後才調整會發出機械噪音的鏡頭光圈葉片
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看來ND減光鏡要派上用場了....



至於30fps指的是錄製出來的影片規格
並不是錄影時5D2的快門速度...
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