[karry]

紧急通告:EOS-5D出现的重大问题!!!!!!!!!~
http://forum.xitek.com/showthread.php?threadid=353768

[beancurdbean]

舊聞啦
萬中無一, 仲要換鏡parts就ok, 都未肯定關唔關部機事

[karry]

[QUOTE]Chuck Westfall comments on 5D camera banding issues
Thursday, February 23rd, 2006 in Canon Camera |
Hi, Folks:

All of us here in the Camera Division at Canon USA are getting ready to spend the next 10 days in Florida working hard at the PMA show, so time for web monitoring has been somewhat scarce lately. In any event, as promised, Canon Inc. in Japan has indeed been actively investigating the claims of banding under certain conditions with the EOS 5D since the first reports surfaced shortly after the camera was delivered to the market. Here is what we have been told so far:

“There may be cases where random noise or pattern noise [banding] stands out in images taken at high ISO settings. This is because the noise component is also amplified at high ISO settings. Various measures are taken to reduce noise, but the fact is that it cannot be entirely eliminated technologically. We are continuing to work on reducing noise even further.”

“The following shooting techniques can reduce or prevent the occurrence of noise.”
* Whenever possible, use low ISO settings (ISO 800 or lower)
* For subjects that do not move, use One-Shot AF mode

“Horizontal line noise may be somewhat more noticeable for the following six lenses when compared to other lenses, but horizontal line noise with these lenses can be reduced by replacing parts.”

EF85mm F1.8 USM — Part No. YG2-0199-000
EF16-35mm F2.8L USM — Part No. YG2-2011-129
EF17-40mm F4L USM — Part No. YG2-2081-009
EF20-35mm F3.5-4.5 USM — Part No. YG2-0268-009
EF24-85mm F3.5-4.5 USM — Part No. YG2-0299-009
EF28-200mm F3.5-5.6 USM — Part No. YG9-2059-170 or YG9-2059-179

“Going forward, we will continue to work on even further noise reduction in the development of both cameras and lenses from now on. It would be difficult to completely eliminate noise, but we will continue to make efforts to reduce it.”

That is all the information we have at present. If there is anything else, we will pass it along.

Best Regards,

Chuck Westfall
Director/Media & Customer Relationship
Camera Marketing Group/Canon U.S.A., Inc.

“horizontal line noise with these lenses can be reduced by replacing parts ”应该是指更换除了这六?以外的镜?。

DPreview上也指出：

AI Servo interference banding

Credit for the discovery of this particular issue must go to our discussion forums. Quite a few early adopters there noted that when using certain lenses at high sensitivities in AI Servo (continuous auto focus) mode banding interference artifacts can be seen, most clearly in shadow areas. This appears to be some kind of radio frequency or electrical interference from the auto focus motor. Obviously this is a fairly specific issue which would only be an issue if you do a lot of continuous auto focus shooting with certain lenses

因此?少使用连续对焦模式或者这六?型?的镜?可以?少这种情?的?生概率。

这?“据说”是5D图像?理芯片多通道读取惹的祸。
[/QUOTE]

乜出廠冇check o既咩?

[beancurdbean]

唔知o咼
個condition o甘覆雜, 又要指定6支鏡, 又要ISO800以上, 又要高反差, 又要主體郁, 又要唔係用one-shot.......唔知係唔係試唔出呢??

天下烏鴉一樣黑, 另一大廠出D200, ISO200背光就見到直紋, 仲要大多數都有
"乜出廠冇check o既咩? " 點識答你

至少未發現有一個HK 5D用家影到橫紋

[kingkonghk]

或者影到格仔呢

[beancurdbean]

Canon 個6支USM鏡 + D200 好大機會影到格仔 ^^