作者Lyapunov ( )
站内DSLR
标题[情报] Olympus vs Panasonic 25mm (Robin Wong)
时间Sun Feb 16 21:10:43 2014
来自43 rumors
http://ppt.cc/6xFr
值得注意的是测试用机身是O家新机E-M10，也许用P家机身结果会不一样？
结论：
1) The Olympus lens is slightly wider in field of view than
the Panasonic lens
同是25mm但Olympus视角大一点点？好像之前在其他镜头有过类似的讨论。
2) The Olympus lens is *possibly 1/3 EV brighter than Panasonic
lens (not conclusive, based on just quick observation on EXIF data)
同样参数下Olympus镜头的结果可能比较亮。
3) There is not much difference in shallow depth of field rendering
between F1.8 and F1.4 lenses (if point number 2 is true, the gap is
bridged due to either the Olympus lens being 1/3 EV brighter than
F1.8 or the Panasonic lens being 1/3 EV darker than F1.4. This is
just my observation, not a conclusive statement)
两者光圈全开时的散景差异不大。
4) Although Olympus magnification factor is 0.12x and Panasonic
magnification factor is 0.11x, I find the close up shooting capability
of Olympus lens to be significantly better than the Panasonic lens.
O 25mm f/1.8实际放大率比P 25mm f/1.4大很多！
5) Panasonic lens has poorer CA control (especially shooting wide open) and
corner sharpness than Olympus lens.
这在O家机身上应该不意外...
6) General sharpness between both lenses are almost identical
期待在P家机身上的测试！
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 64.134.243.121
※ 编辑: Lyapunov 来自: 64.134.243.121 (02/16 21:12)
1F：推 lef1986:等我发吧 02/16 21:28
2F：→ PlayStation3:镜头较广跟比较亮有可能是什麽原因..? 02/16 21:59
3F：推 Pettit:比较亮可能是镀膜或其它影响?同是O家镜12f2也是比12-50透亮 02/16 22:01
4F：→ Lyapunov:O家镜头普遍较广好像之前有讨论过，忘了是哪篇... 02/16 22:03
5F：→ tyf99:25/1.8优点被放大，弱点则是轻描淡写过去。 等第三方评测 02/16 22:04
6F：→ Lyapunov:较亮的部分其实他没有真的去比数值，只是用肉眼判断的。 02/16 22:05
7F：→ Lyapunov:相比之下最吸引我的反而是最近对焦距离XD 02/16 22:06
8F：推 skychy:E-M10有修正色散啊～ 或许接到其他没修正的O家机身就有差吧 02/16 22:19
9F：→ PlayStation3:丢到BMPCC上面测好了XD 02/16 22:21
10F：推 atropos:这文章实在有些问题 @_@ 02/17 09:57
11F：→ skychy:可以请楼上稍微提点一下问题点在哪里吗？ 小弟眼残没有发现 02/17 10:59
12F：推 atropos:一开始的"50/1.4 vs 50/1.8"就很多不对 02/17 11:07
13F：→ atropos:简言之f/1.8先天上就比f/1.4难度低很多 02/17 11:08
14F：→ atropos:以变形抑制/周边画质/像场平整度而言常会是50/1.8较好 02/17 11:09
15F：→ atropos:不过C/N的50/1.8都粗制滥造就是了 02/17 11:09
16F：→ atropos:O如果好好做25/1.8, 赢过P 25/1.4并不意外 02/17 11:10
17F：→ atropos:再来进光量的部分一直拿F光圈在讲这观念上就错啦 02/17 11:10
18F：→ atropos:近拍测试一定哪里有问题, 0.11x跟0.12x根本没差那麽多 02/17 11:11
19F：→ atropos:不用去管最近对焦距离差多少 02/17 11:12
20F：推 skychy:原来A大指的是这些点，小弟受教了～ 02/17 11:14
21F：推 bennylie:推一下对C/N 50/1.8粗制烂造有同感 02/18 11:05