J*o
2 楼
吊炸天,真心毒德大学啊~
G*g
3 楼
接着放毒...这回上架子了
c*e
4 楼
给花喷水=德味
看这不错,有味道。
看这不错,有味道。
t*8
5 楼
真心毒啊
J*o
9 楼
手动还没防抖必须得架子妥妥的
100mp估计是日蔡唯一一个能毒到人的了.. added to wishlist
100mp估计是日蔡唯一一个能毒到人的了.. added to wishlist
G*g
12 楼
接着放... 室内吊灯光, ISO = 8000. 有意测了一下边角的分辨率. 感觉Zeiss 100mm
的锐度加上1Dx的对焦和高感, 无敌了.
的锐度加上1Dx的对焦和高感, 无敌了.
G*g
14 楼
总体感觉这镜头的锐度弥补了放大率的不足。 另一方面讲,放大率小,镜头的有效光
圈在MFD时受的影响小。比如这蔡司头全开 f/2.0, 放大率0.5,有效光圈只降低到 2 +
2 X 0.5 ~= 3. 佳能的百微,全开f/2.8, 放大率1, 有效光圈会降低到2.8 + 2.8 X
1 ~= 5.6.
缩光圈的情况下,影响会更为显著。用Excel作了个简单的图,大家对比着看看吧。
Effective Aperture ~= (Aperture Setting) + (Aperture Setting x Magnification
)
另外,佳能的相机,取景框内只显示相机设定值。理光的机器,据说显示的是有效光圈
数。这方面看,理光还是比佳能厚道点。
圈在MFD时受的影响小。比如这蔡司头全开 f/2.0, 放大率0.5,有效光圈只降低到 2 +
2 X 0.5 ~= 3. 佳能的百微,全开f/2.8, 放大率1, 有效光圈会降低到2.8 + 2.8 X
1 ~= 5.6.
缩光圈的情况下,影响会更为显著。用Excel作了个简单的图,大家对比着看看吧。
Effective Aperture ~= (Aperture Setting) + (Aperture Setting x Magnification
)
另外,佳能的相机,取景框内只显示相机设定值。理光的机器,据说显示的是有效光圈
数。这方面看,理光还是比佳能厚道点。
c*n
15 楼
终于还是上了,嘿嘿!毒物啊!
c*n
16 楼
+
X
Magnification
这段不太理解
【在 G*******g 的大作中提到】
![](/moin_static193/solenoid/img/up.png)
: 总体感觉这镜头的锐度弥补了放大率的不足。 另一方面讲,放大率小,镜头的有效光
: 圈在MFD时受的影响小。比如这蔡司头全开 f/2.0, 放大率0.5,有效光圈只降低到 2 +
: 2 X 0.5 ~= 3. 佳能的百微,全开f/2.8, 放大率1, 有效光圈会降低到2.8 + 2.8 X
: 1 ~= 5.6.
: 缩光圈的情况下,影响会更为显著。用Excel作了个简单的图,大家对比着看看吧。
: Effective Aperture ~= (Aperture Setting) + (Aperture Setting x Magnification
: )
: 另外,佳能的相机,取景框内只显示相机设定值。理光的机器,据说显示的是有效光圈
: 数。这方面看,理光还是比佳能厚道点。
G*g
17 楼
大段科普 ...
http://en.wikipedia.org/wiki/Numerical_aperture#.22Working.22_o 2_f-number
Working (effective) f-number
The f-number describes the light-gathering ability of the lens in the case
where the marginal rays on the object side are parallel to the axis of the
lens. This case is commonly encountered in photography, where objects being
photographed are often far from the camera. When the object is not distant
from the lens, however, the image is no longer formed in the lens's focal
plane, and the f-number no longer accurately describes the light-gathering
ability of the lens or the image-side numerical aperture. In this case, the
numerical aperture is related to what is sometimes called the "working f-
number" or "effective f-number." A practical example of this is, that when
focusing closer, with e.g. a macro lens, the lens' effective aperture
becomes smaller, from e.g. f/22 to f/45, thus affecting the exposure.
【在 c**n 的大作中提到】![](/moin_static193/solenoid/img/up.png)
:
: +
: X
: Magnification
: 这段不太理解
http://en.wikipedia.org/wiki/Numerical_aperture#.22Working.22_o 2_f-number
Working (effective) f-number
The f-number describes the light-gathering ability of the lens in the case
where the marginal rays on the object side are parallel to the axis of the
lens. This case is commonly encountered in photography, where objects being
photographed are often far from the camera. When the object is not distant
from the lens, however, the image is no longer formed in the lens's focal
plane, and the f-number no longer accurately describes the light-gathering
ability of the lens or the image-side numerical aperture. In this case, the
numerical aperture is related to what is sometimes called the "working f-
number" or "effective f-number." A practical example of this is, that when
focusing closer, with e.g. a macro lens, the lens' effective aperture
becomes smaller, from e.g. f/22 to f/45, thus affecting the exposure.
【在 c**n 的大作中提到】
![](/moin_static193/solenoid/img/up.png)
:
: +
: X
: Magnification
: 这段不太理解
G*g
23 楼
试了试用来打鸭,效果还行。 打鸟肯定不奢望了。
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