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 楼主|
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: . W) Y+ k/ \! J! |8 s. t+ g8 i0 \# S  E% M5 C* n1 v. b, D
 F4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。  D5 t  M3 O) l, i( y* U% ]* g8 n% D
 
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 . E/ i% Q2 X+ P! vAnyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:2 \9 ?3 v0 `! F8 m
 
 * T/ J/ G- i8 n3 v0 I9 d1) 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.! y- G2 N7 D) `- n1 y9 F* K
 
 ) l; b3 T7 w+ G5 ]+ x' ]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.% }& V# b& G: s# W* j
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 3) The f/4 is lighter and smaller. Winner f/4.( D/ v. g% f- D; Y$ X/ L
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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.% x% f  A3 q9 a6 H
 
 3 |7 S7 ]' [% j9 L; X* W5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8.
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