Philip, need your help again

[匿名]

2010-04-30 12:26 pm

How do I obtain "Depth of Field"? I used the AV function (Aperture priority) in Canon EOS 1000D. No matter I use the f/5.0 or f/20, the picture looks exactly the same. Can you explain to me why this happens? Maybe my focus is too far, I think. Correct me if I am wrong.

回答 (1)

島耕作

2010-04-30 5:32 pm

✔ 最佳答案

我估計最大原因就正如你所講你對焦對得太遠.放大率是一個非常影響景深的因素.同樣用F5.0光圈,影一個全身人像同埋影一隻水杯,如果佢地在畫面都係咁大的話.景深效果絶對係兩回事.水杯嗰張個背景會化好多好多.
但係影人既話如果靠到咁近,你就只可以影大頭,所以想影人像全身都有淺景深效果就需要較大光圈的鏡頭.咁就唔駛放咁大都可以有淺景.
另外長焦距鏡頭都有利矇化背景的,雖然清晰範圍係差不多,但係背景矇的地方會被放大,看起來比較化.

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