[情報] Olympus vs Panasonic 25mm (Robin Wong)

[Lyapunov ( )]

來自43 rumors http://ppt.cc/6xFr

值得注意的是測試用機身是O家新機E-M10，也許用P家機身結果會不一樣？

結論：
1) The Olympus lens is slightly wider in field of view than
the Panasonic lens

同是25mm但Olympus視角大一點點？好像之前在其他鏡頭有過類似的討論。

2) The Olympus lens is *possibly 1/3 EV brighter than Panasonic
lens (not conclusive, based on just quick observation on EXIF data)

同樣參數下Olympus鏡頭的結果可能比較亮。

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)

兩者光圈全開時的散景差異不大。

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實際放大率比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.

這在O家機身上應該不意外...

6) General sharpness between both lenses are almost identical



期待在P家機身上的測試！


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◆ From: 64.134.243.121
※ 編輯: Lyapunov        來自: 64.134.243.121       (02/16 21:12)
推 lef1986:等我發吧
→ PlayStation3:鏡頭較廣跟比較亮有可能是什麼原因..?
推 Pettit:比較亮可能是鍍膜或其它影響?同是O家鏡12f2也是比12-50透亮
→ Lyapunov:O家鏡頭普遍較廣好像之前有討論過，忘了是哪篇...
→ tyf99:25/1.8優點被放大，弱點則是輕描淡寫過去。 等第三方評測
→ Lyapunov:較亮的部分其實他沒有真的去比數值，只是用肉眼判斷的。
→ Lyapunov:相比之下最吸引我的反而是最近對焦距離XD
推 skychy:E-M10有修正色散啊～ 或許接到其他沒修正的O家機身就有差吧
→ PlayStation3:丟到BMPCC上面測好了XD
推 atropos:這文章實在有些問題 @_@
→ skychy:可以請樓上稍微提點一下問題點在哪裡嗎？ 小弟眼殘沒有發現
推 atropos:一開始的"50/1.4 vs 50/1.8"就很多不對
→ atropos:簡言之f/1.8先天上就比f/1.4難度低很多
→ atropos:以變形抑制/週邊畫質/像場平整度而言常會是50/1.8較好
→ atropos:不過C/N的50/1.8都粗製濫造就是了
→ atropos:O如果好好做25/1.8, 贏過P 25/1.4並不意外
→ atropos:再來進光量的部分一直拿F光圈在講這觀念上就錯啦
→ atropos:近拍測試一定哪裡有問題, 0.11x跟0.12x根本沒差那麼多
→ atropos:不用去管最近對焦距離差多少
推 skychy:原來A大指的是這些點，小弟受教了～
推 bennylie:推一下對C/N 50/1.8粗製爛造有同感