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發表於 2008-1-21 23:51
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Fred Mirenda另一位50/1.2L使用者的心聲。[s:52]
http://www.fredmiranda.com/revie ... mp;cat=2&page=3
幫大家翻譯如下，順便練練英文。
I tend not to harshly evaluate lenses, as I know that no lens will ever be perfect. However, this lens
has been a very large disappointment for me (in addition to a waste of time and money). I heard plenty
of talk about focus issues with this lens and how it\'s not much sharper than the EF 50mm f/1.4 USM
lens. Still, I purchased it because I expected very good contrast and wide aperture effects (thin dof,
pleasant bokeh).
我傾向不苛刻地評論一隻鏡頭，因為我知道沒有鏡頭是完美的。但是，這隻鏡頭(50/1.2L)真的非常令人失望(而且還浪費
我的時間跟金錢)。在買這支鏡頭之前我已聽過50/1.2L有對焦方面的問題，而且沒比50/1.4銳利多少。我之所以還會買的
原因純粹是因為預期50/1.2L有良好的反差跟迷人的散景。
I did experience the above characteristics, but the EF 50mm f/1.2L USM lens suffers from a design flaw:
focus drift and backfocusing. The lack of a floating aspherical element means there will be depth of field
aberrations when stopping the lens. That is, the depth of field will appear to shift back when narrowing the
aperture.
50/1.2L良好的反差跟散景我的確有體驗到，但是我不得不說50/1.2L的確有設計上的瑕疵 : \"Focus Drift(不知怎麼翻比較好)
還有\"焦點後移\"。50/1.2L缺乏浮動對焦鏡組的設計注定其再縮光圈時會有像場像差(depth of field aberrations)的問題 -
意指像場會隨著縮光圈而後移。
I have evaluated four copies of the lens on two camera bodies (one old calibrated body and a relatively new
body), and each copy exhibits backfocusing. Even after compensating for the backfocusing, the lens sharpness
at the center of the image circle within the depth of field isn\'t too good. I compared it against the 50mm
f/1.4 USM lens at f/1.4 and f/8. While the 50mm f/1.2L is the clear winner at f/8 in terms of contrast and
sharpness, at f/1.4, the 50mm f/1.4 lens actually wins out in sharpness. I couldn\'t believe it so I exchanged
the lens once in May. Same deal. When I decided to give the lens another chance in October, I was disappointed
yet again.
我在兩台機身上試過四支50/1.2L(一台之前進廠校正過，另一台比較新)，四支50/1.2L都有焦點後移的問題。即使調過焦，
這些鏡頭中央部位的銳利度都不算太好。和50/1.4相比，50/1.2L在F/8時的對比跟銳利度明顯是贏家，但是在F/1.4時，50/1.4
反而比較銳利!!!我不敢相信結果竟是這樣，所以我五月時退回這隻鏡頭換了一隻，沒想到還是一樣。十月時我決定再給
再給50/1.2L一次機會，沒想到結果還是讓我很失望。
People with a need for speed will buy the 50mm f/1.2L USM because of its strengths and in part due to a need
for speed. But with severe issues in terms of the focusing and focus drift, I don\'t think any price, no matter
how reasonable, can justify this lens\' flaws. If you\'re looking for a great f/1.2 lens, the EF 85mm f/1.2L II
USM will do everything you ask of it. But as for the EF 50mm f/1.2L USM, buyer beware.
人們會買這隻鏡頭就是為了F/1.2大光圈的優勢，但因為這隻鏡頭嚴重的焦點後移跟\"Focus Drift\"的問題，我不認為任何
價錢，即使價錢如何合理，能合理化50/1.2L的瑕疵。如果你要找一隻偉大的F/1.2鏡頭，85/1.2L II能符合你任何要求。但若換成50/1.2L，
嘿嘿...各位自求多福了。
[ 本帖最後由 vario_sonnar 於 2008-1-22 11:13 編輯 ] |
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樓主: vario_sonnar
發表於 2007-10-21 22:14
