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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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' J9 [* R @3 t$ |& T7 dF4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。
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/ j) q4 I0 w7 o- K) ]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% R: e" `( D* o1) 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.& g4 w- c: |5 M% L3 ^- f- Z x
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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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% |* B/ a6 W3 L+ D3 u3) The f/4 is lighter and smaller. Winner f/4.8 A! F; h: @6 C$ u, k0 r
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4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8." `. k# L- w) Z! n$ P( N8 v- p
9 P! R" |2 e" s( Z( N' g5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
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