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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' U: D0 u% G0 K
0 h/ d" [7 G5 Z; u8 U5 NF4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。
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6 W+ B0 j! `4 v# s+ _% W! ?4 L& u) AAnyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:
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) i! a; A/ f( A6 d( s# H/ K+ \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.* N4 J" v# K! L# U4 ?0 {. V) A
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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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3) The f/4 is lighter and smaller. Winner f/4.2 w8 Z% J4 M- g3 n G- E
# ?* ^9 N$ m) U# c B4) 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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]! M) {! ^! |; o) P( z6 b5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
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