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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:& b* _( E- n# @2 G# X& u* }
& A# D0 i1 [1 tF4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。. K4 n4 u& ^8 `" T* T5 g% M3 H/ }
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Anyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:: a" S0 l; }' w# |2 Z' B
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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/4.7 i" E8 C$ R/ s' A; 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.: M/ G/ T7 E5 i Q) Q" B; i7 L
: g- \: a) v e' Q/ Z3) The f/4 is lighter and smaller. Winner f/4., P7 Q6 |- p2 p
5 P$ O( A- O- w: ~( L4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.. t: O/ K: ?3 e9 c
- ^- o: U0 L& Z& O- o$ K$ b5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
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