地圖上的流浪者 wrote:
至於一吋DC的表現，有一些功勞都該歸在背後的數位修正
M4/3剛出頭時還一堆人罵數位修正用很大，結果RX100用上之後馬上180度大轉變...
有包含到28-70mm這焦段的變焦鏡
沒套數位修正的話，廣角端變形肯定都很明顯
至於M4/3當初定位就是單眼等級，玩家要求自然高些
看看O、P兩家推出的大三元價格根本不輸APS-C大三元多少...
至於RX100充其量還是小DC，那個畫質其實差很多
但看在體積上就沒啥好計較了
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SKAP wrote:
有包含到28-70mm這焦段的變焦鏡
沒套數位修正的話，廣角端變形肯定都很明顯
14-35 F2
那請您鑑定一下這管變形明不明顯
要不變形當然有辦法做得到
但體積一定小不下來
市場會接受嗎?
大三元貴不是正常的嗎?
有需要的自然會買
用不到的也是有其他CP值爆表的好鏡可以選
沒有的時候嫌沒專業鏡
有的時候嫌太貴
定位不同值不值得就看人囉
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s9001682 wrote:
14-35 F2
那請您鑑定一下這管變形明不明顯
Olympus Zuiko Digital ED 14-35 mm f/2.0 SWD
In the case of the 4/3 system the distortion is always an interesting issue. A small sensor demands using very short focal lengths and it might always be a potential source of problems with the correction of that aberration. How does the Olympus Zuiko Digital ED 14–35 mm f/2.0 SWD fare here? At the shortest focal length we noticed barrel distortion of –2.52%. This value is noticeable but not especially bothersome. In the middle of the range the distortion decreases to –0.41% and to –0.01% at the maximum focal length. The Olympus shouldn't be ashamed of such a performance, especially compared to its full frame competitors. In fact the only difference is the sign of the distortion. For the Olympus it is barrel in the whole focal lengths range . For the lenses of 24-70 or 28-70 mm class we deal with barrel distortion at the wide end which becomes quickly zero with the increase of the focal length and is pincushion for the middle and the end of the range.
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Olympus 14-35mm f/2 ED SWD Zuiko Digital (Tested)
Distortion
Distortion is very well-controlled on the 14-35mm ƒ/2, giving results which are to be expected from such a wide-angle lens. Used at its widest angle (14mm) the lens produces significant barrel distortion in the corners, just over 0.5%, and about 0.4% in the center; this decreases as you zoom in to the image, until a 0-distortion parity is achieved around 28mm. Technically there is a little barrel distortion at 25mm, less than 0.1%, but effectively you won't see it; this makes for a very acceptable ''standard'' 50mm lens.
Greater than 28mm, and we start to notice a slight pincushion distortion, but it's not terribly significant: around -0.1%.
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This value is noticeable / 這個值是顯著的
significant barrel distortion / 顯著桶形失真
這不是我說的，是那2個鏡頭評測網站說的
廣角28mm，跟中望遠70mm，是不同的設計概念
就好比汽車要像機車那樣省油，又要跑得跟F1一樣快
做到極致，也只是減輕桶形失真
跟高檔定焦鏡幾乎無桶形失真還是不能比
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