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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:7 {9 U' E* ]% N( P
# a+ e$ X+ C( i: ZF4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。. t2 ~, G- J2 r
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$ L, l; _7 M0 b0 g2 ]' KAnyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:
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Q7 a% d8 z9 ^ N w! Q1) 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.: @% U# X. B z5 \6 ^- k2 G
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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.$ H/ O$ v4 U- }2 a. O( o# j
P8 C( H5 R4 d/ F- l3) The f/4 is lighter and smaller. Winner f/4.) x2 V( g4 z' x- q: {
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4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.8 d/ D! E- v& ^2 j5 c/ v7 s
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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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