diffusionless wrote:
之前7D測試結果好像其他的不是很好...(恕刪)
這樣的說法也不是很完整很公平
節錄該網站關於AF的完整描述:
If this result is representative of Zone AF, then Zone AF will be the way wrong choice for fast-moving subjects. We had better luck tracking the same dog with Spot AF.
這個測試項目的結果僅代表Zone AF在fading light下追蹤快速移動物體下的結果
如果要追蹤快速移動的物體,可能需要從區域對焦模式切換到點對焦。
其他的AI Servo AF結果如下:
Continuous focus using Spot AF, centre AF point, AI Servo and the EF 200mm f/2L IS, tracking a soccer player for a few minutes in fading light, the results showed promise but were ultimately inconclusive: through about 200 frames, the camera was able to hang onto focus properly for portions of several sequences,......
Continuous focus using Zone AF, nine points in the centre, AI Servo and the EF 800mm f/5.6L IS, tracking distant seagulls in semi-overcast light, the results were pretty good.
it's likely that focus on static subjects is going to be solid. We'll need to give the camera more of a continuous focus workout than this, however, to see if it will be right for peak action sports.
別的網站7D的AI Servo AF測試結果:
http://www.prophotohome.com/news/2009/11/26/autofocus-torture-test/
只能說每個網站測試的條件、測試的項目與測試結果不太一致
代表每個動態追焦AF都有其限制,必須在適當的場合使用適當的AF追焦模式
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