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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:7 m1 D1 V8 e; ~) c+ g4 P) ?1 K
* q& G, s; v5 T0 jF4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。
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Anyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:" U7 z9 s0 Z" F" Q- W3 k P( A! Q
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1) 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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# j3 z. i+ E. @) r, z) f! ^5 j2) 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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, g x/ Q) b! J& e( y7 I f4 W0 }3) The f/4 is lighter and smaller. Winner f/4.
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7 k7 y* q, k, _8 L. `% x4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.( W$ @* ~6 c$ H2 h' C
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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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