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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:1 y2 j* k* D# N4 t
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F4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。
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R7 H" m! O6 A1 |4 j# |; f$ fAnyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:' [( D- k( Y3 g8 N8 [ i! o
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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.$ r( y+ G& W/ Z9 |; t
4 r2 N6 E7 Q) ~$ R2) 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 T- T% h$ q+ t; v7 ?2 P+ T* z
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3) The f/4 is lighter and smaller. Winner f/4. x/ ?& O% r. A
" \6 a, s' u) n- b" k, z7 {$ Z4) 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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0 O# Q4 H3 s9 A' h+ ]5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
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