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發表於 2011-10-22 16:09:59
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本帖最後由 maestro 於 2011-10-22 16:11 編輯
回覆 定風波 的帖子
Check this out brother...
http://photodoto.com/understandi ... d-aperture-and-iso/
It talks a little about the relationship between shutter speed, aperture and ISO.
"The last thing to remember is that shutter speed, aperture, and ISO are usually expressed in numbers that indicate a halving or doubling of exposure. For example, 1/30s lets in twice the amount of light as 1/60s but half as much as 1/15s. f/4 lets in twice as much light as f/5.6 but half as much as f/2.8. And ISO 800 is twice as sensitive as ISO 400 but half as sensitive as ISO 1600. This is useful to remember if you are going fully manual and want to control all three settings yourself. For example, if you slow down the shutter speed by half, you can either decrease the aperture size to keep the same exposure (1/60s @ f/5.6 is the same as 1/30s @ f/8) or decrease the ISO while keeping the aperture constant (1/60s @ ISO 400 is the same as 1/30s @ ISO 200 with constant aperture)."
I hope it helps... |
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發表於 2011-10-22 09:26:12
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在線雷達
波哥哥！E+數碼化D數據。。。姦姦牌子5同。。。
檫出乜X呀。。。
