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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:! |* V2 o, K  ]7 G# @0 F+ _4 j% X ' I0 ?5 L$ l/ V# m4 L$ d
 F4 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:5 h, K" V$ Y" k6 D+ |- F3 W7 e5 T
 
 8 h  e3 {, d3 ^) y# W1) 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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 " r: w; w( d  o3 P  j3) The f/4 is lighter and smaller. Winner f/4.
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 $ {* Q3 C$ a9 D6 Z# O, Q- C! D4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.. F8 D2 x: M5 c0 v1 D
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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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