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发表于 2010-10-5 20:41
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正好刚看到一个类似的问题在别的英文论坛:
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l8 e* }; ]' j0 l. g& i5 H2 B CF4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。& c. Y: k. v- f7 d
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Anyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:
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! \ V+ m% c0 _2 S: b7 C1) The f/2.8 gives you one extra stop of hand-holding possibility, but at the cost of depth of field, whereas the 4.0 gives you 3 stops of hand-holding possibility at any aperture. Winner: f/4.
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2) The f/2.8 gives you one extra stop of light in darkened conditions when photographing moving subjects. The f/4 doesn't. Winner: f/2.8.
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; Y2 |) x& [, `; U4 ^; b3) The f/4 is lighter and smaller. Winner f/4.
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+ _# h" {1 U) K* D' n5 A4 ^4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.$ y' ~' l/ @, g" R1 k3 F6 l- a3 e
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5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
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