"黑色的部份會泛點紫色在上面" 鏡頭的問題吧！
曾經拍同一個景,70-200mm不會,但70-300mm就會有紫邊這現象.  

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推薦者: ysrl

Canon 5d2 應該是有問題的,雜訊或色偏是很嚴重,就我的角度來看,不知是韌體還是硬體,因為更新1.06到1.07版仍是無用,為什麼大家的評價都那麼好,攝影家手札出的測試報告為什麼都沒提到,自2008/12/16 購買時就存在雜訊及色偏問題(回去檢視之前風景照片,但人像就相當優異所以就忽略掉),目前更嚴重,送彩虹檢查,以此狀況比50D 還不如,是讓人無法接受,狀況是這樣,
5d2+16-35mm ii 相片風格選風景(應該都是在此狀況下產生,銳利度4)raw 檔
5d2+17-40mm  相片風格選風景(應該都是在此狀況下產生,銳利度4)raw 檔
各種光圈及ISO 狀況下都有雜訊或色偏問題(色偏是紫色或棕色,反正就是碰到山或樹木陰暗處就是一長塊狀),只是程度大小,大光圈沒試過,70-200mm is 沒問題,目前應還沒試過手動模式或標準設定
是不是請有5d2 試一下是不是有問題,攝影家手札之測試前輩也發表一下意見,因為很多人是看了手札出版的書才買的,2009年攝影年鑑還是如此推崇

如果曝光準確,暗部雜訊也是沒輒,相機軔體是整張照片去雜訊的,無法只針對暗部.

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I noticed this problem from the released sample images, and that is why I think 1Ds MkIII is much better.  There is another problem with 5D MkII -- distanced object with low contrast has very low resolution.  Sony A900 has the same problem too.  Nikon D3X is much better on this.  I think 1DsMkIII and D3X are the two that really worth to consider if you really looking for resolution at this level.

By the way, for the colored noise, you can use FixerLab's Noise Fixer to remove.  Remember, you only need to use the color noise removal, and set at around 30 or less, depends on your image quality.  This will not affect your detail at all.  All the other noise removal programs will remove too much details for the camera with such a high resolution.  

5d2的问题还比较多 是否是自身固件存在缺陷？

目前彩虹檢查結果是調整CMOS ,是不是就可排除所有之問題,3/9 取回時會問清楚
我2008/12/16 拿到5D2,12/18-12/20 員工旅遊開始拍照,陰天拍人像風景+580 EX 補光(用人像模式)暗部就有雜訊(放大50%),其他前面已提出相關之問題

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更正,再看細節,5D2+17-40mm 光圈從22-9.0,使用相機之原始設定,標準(銳利度3)或相片風景模式(銳利度4),自動白平衡,山之暗部或天空只要IS0 超過200 就開始有雜訊,ISO 400,800,1600,3200,6400 就愈嚴重,

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哇塞~

我看我還是觀望久一點再說吧!

5D2 真真假假的問題...

真的是讓人很難下手!

Sorry that I didn't check back for quite a long time.  Kind busy on desinging new cameras these days...
Attached are two captured video frame -- forgive me on the distored iamge, the actually image on video was scaled to 1920x1080, but the video frame captured is 1440x1080.  Because it is very difficult to find a noisy images like the videos at dark these days.  The first image was direct captured and the second was processed by FixerLab's NoiseFixer -- I bought mine 8 years ago and I believe that the new version should be much better.  
Please take a look at the green and purple noise under the girl's arm, and the other one only have the luminance noise (black dots) which I hardly care about.  Because it resembles the film grain and also gives you some more "detailed" feeling.  This is the place which gives you so called "extended resolution".  On the other side, the colored noise, because the nature of de-mosaic, they become much larger (2 by 2 pixel to begin with with double the noise than luminance noise and after bluring/denoise, it becomes much much larger).
Sorry for the poor quality image, but this is the easier way to show the difference.  Notice that I didn't reduce the luma noise with NoiseFixer at all, because with 5D2, you hardly need to do that.  My purpose is to show that you can't see any detail lose at all even if you blow up a photo to 300%!  If you want to check more in detail, you can sent me a ISO3200 night photo and I can process it with my version of NoiseFixer.
I am not affiliated with this company and my D3 has very little chroma noise which don't need to do with this program at all...


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