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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:! } y. t/ p2 X/ A+ M, x/ U
4 B4 w7 \* ~% A, M. h GF4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。3 |) e8 G' z* L6 p
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/ g. t# m; p' ~+ JAnyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:; F7 Y- E0 V: |" G: A/ X* s
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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., d/ T5 J, @: ~0 D( 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/2.8.7 p$ v4 `, a# T4 K* O, R
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3) The f/4 is lighter and smaller. Winner f/4. |) r3 \" |4 c% T/ p7 v9 m3 v5 I7 [/ c
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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.
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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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