 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:! T* A8 E4 ]" r$ Q" C! j2 B
6 o6 U% U. T4 ~* Q Y: P
F4 IS Vs. F2.8 non IS, 贴过来大家都评论评论。% E$ `- c: `# e0 u, I7 ?
/ f2 R6 `( N: R; B
**********************************: Q( _' R" a8 P4 S/ x" A
Anyhow, you pose a good question - f/4 IS or f/2.8 non IS. Here are the main points:3 ~! ]) Y5 V9 v
/ b0 [6 L/ ?; w, ?; u
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.$ D2 C" w+ n" X6 g& Y8 N0 S
+ c4 _& q: g$ l+ R( C* D* g2) 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.
Y2 |0 x- K# L4 @
! K9 x: T& `" M( t" v3) The f/4 is lighter and smaller. Winner f/4.5 F" U! L8 V' @: n1 s
' |# S% e8 |5 _
4) The wider aperture of the f/2.8 can offer more creative possibilities, especially when taking portraits. Winner: f/2.8.
5 W' O. g1 C% [8 V: x! D4 r) j
L+ F) p1 N& }) I+ b- A5) The f/2.8 has better bokeh (creaminess of the blurred areas). Winner: f/2.8. |
|