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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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0 h/ b0 D# N1 o5 ^, b" c+ ?F4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。1 y$ k: j" |$ Z' } L
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+ [0 ]! n" `/ c oAnyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:
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. X* h, V! ~& K) F1) 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., {9 m- K* W7 t9 P0 j$ R; s1 Q( c7 J9 G
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3) The f/4 is lighter and smaller. Winner f/4.
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% U# {$ e# o- U7 @& R5 Y* [4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.9 C' ^+ m. m* l7 o- v8 _
0 K- s6 |' Q8 `' E3 O# ]7 {3 H5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
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