 鲜花( 21)  鸡蛋( 0)
|

楼主 |
发表于 2010-10-5 20:41
|
显示全部楼层
正好刚看到一个类似的问题在别的英文论坛:( Y9 F$ c* k& w+ y2 c5 S- P; W
( _$ C( B* I0 j. N2 X
F4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。3 e3 L' K) S2 `# m1 A
p3 j# U! a) H
**********************************3 e1 E6 N* p8 \
Anyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:
8 i9 c, X+ j9 r+ R1 B( S5 n) k, g7 w7 Y7 X' l( j- a& w
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.
# D. }( j% `# \/ S: Z! M! d9 [, ~( B" B0 P; {- z; S- P
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.
+ q4 t- ]- ]! o0 Q2 l7 h
( B% x7 O& \+ I$ \' q% M* H1 L3) The f/4 is lighter and smaller. Winner f/4.
% [( i2 f1 _0 |9 ^7 ? p K0 n1 m9 Q7 g6 W! x+ x
4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.2 I! K$ e1 H$ A# ]- w& m) Q
/ o8 {3 v4 R0 o4 [$ v5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
|