5D Mark || 震撼出厂！！！
天刚得到佳能全画幅数码单反5D降价的消息，相信一些影友已经跃跃欲试准备出手了，但看到以下消息，不知是不是有些朋友会再等一等了。我们在DPreview论坛看到一则关于佳能5D MarkII的消息，一位不愿透露信息来源的网友称佳能5D的升级产品5D MarkII将于今年4月22日发布，但最终是否会用5D MarkII这个名字，还没有确定下来。
即将发布的5D MarkII将采用一枚1530万像素的全画幅CMOS感光元件，而这枚CMOS的微透镜和信噪比都会有所改进。防尘防水的机身设计具有与佳能顶级单反1Ds MarkIII相同的防护级别。感光度最高达到ISO12800，并可扩展至ISO25600。全新的29点自动对焦系统具有12个高精度十字对焦点，并在对焦速度上比佳能40D提升近35％。快门寿命达到30万次，连拍速度最快更可达到6fps，并最多可拍摄68张图片。液晶屏尺寸将增至3.0英寸并具有更高的92万像素。这款全幅单反还将配备CMOS除尘系统并支持实时取景。
这款单反的上市日期初步定在今年6月份，上市价为3499美元，约合24853元人民币。这个价格比5D高了不少，但如果5D MarkII真将以上述配置登场的话，还是会为我们带来不少惊喜的，并且根据以往惯例，在我国上市的价格都将低于报价不少。但目前这则消息也只是论坛中的谍报，届时会不会像消息中称的那样还要靠时间去检验。
则来自影音类综合论坛“Avforums”的消息看起来有板有眼，且把技术指标开列的十分详细，让人不由得不信：
这个名叫“danburbridge”的网友声称：佳能的全画幅数码单反：EOS 5D markII将不会等到Photokina时在德国展出，而是可能最早于2008年4月22日公开发布。该消息称，之所以提前是为了给大家一个惊喜（同时在于索尼潜在的A900的竞争中尽可能抢到先手？）。
这位先生还为EOS5D MarkII开出了如下的性能清单，可以说指标相当诱人：
全面改进的1530万像素CMOS传感器，相当于35mm胶卷的全画幅尺寸，新的CMOS 传感器将扩大像素开口率，并采用新的集成电路技术以便降低布线高度，并采用重新设计的微棱镜——这些改进确保CMOS对光线的利用率更高，提高CMOS本身的信噪比。
装备2块Digic III处理器，并在处理器中加入名为“ CXR”的新型NR降噪系统，该系统提供更佳的降噪效果，并提供4级NR水平可选。
14bit的A/D转换器
最高感光度ISO12800（可扩展到25600），提供更细致的1/3级步进
全新设计的“29点TTL自动对焦系统”，虽然测距元件依然基于BASIS传感器——为CMOS材料，但其中有12个十字形对焦点，以改善（在F2.8时）对焦精度和使用范围。
新的对焦系统确保AF性能比EOS 40D提高35%
30万次寿命的快门
6fps or 3fps的最大连拍速度，JPEG格式最大可连续拍68张
3寸92万像素屏幕、
Live View功能同40D
EOS内置除尘系统
同EOS 1D Mk3，1Ds MKIII系列的防尘防水性能
此前出现的关于EOS 5D MarkII的假想图
显然，作者试图说明佳能在柯达，索尼等厂商纷纷表示其新的CCD/CMOS传感器加大了单个像素的开口率，简化了布线 以后，也要证明自己的CMOS芯片依然有竞争力。此外，由于D3和可能降临的索尼中高端全画幅DSLR的夹击，佳能也必须使出全力，争回一口气了，毕竟2007年的佳能在中高级市场上作为有限，40D这种小打小闹的改进也是在很难让人信服——因此不管EOS 5D mark II何时上市，相信这次佳能不敢再放一个缺乏吸引力的高级相机了。
The new 5D II will not be released at Photokina, but instead will be a surprise announcement on April 22, according to a source I am unwilling to disclose.
The specs of the new camera are as follows (final name unavailable):
- 15.3 MP full frame CMOS sensor (vastly improved light-gathering capacity per pixel: improved micro lenses; miniaturized micro circuitry; enhanced signal/noise ratio)
- Weather sealing same as 1Ds Mark III
- Dual Digic III with all-new "CXR" NR system reported to best 3rd ** NR software. Available as a C.F with 4 levels of customizable parameters. 14 bit A/D conversion
- ISO 12800 (C.F. up to 25600)
- Reported 1 2/3 stop sensitivity improvement
- All-new 29-point TTL CMOS sensor with 12 cross-type for F/2.8 or faster lens (35% faster than 40D)
- Micro lens fine adjustment for up to 14 lenses
- 300,000 exposure shutter durability
- 6.0 / 3.0 fps
- 3.0" LCD 922,000 pixels
- EOS Integrated Cleaning System
- Live View (improved from 450D; latest generation)
- 6/3 fps continuous shooting for up to 68 frames
- MSRP $3499, available June 2
Additional information and clarifications::
The CMOS in the new camera will be an entirely new generation, not based on the current flagship or the current camera it is replacing. The reason Canon can do this without cutting into the 1D series is because the new flagship will best the 5D in 3 key areas: frame rate, buffer, and AF. Canon recognizes these are extremely important to sports photographers. No one shooting pro sports goes backwards to save a few thousand dollars on a body. Canon knows this and understands it isn't competing against itself - even if amateurs on forums such as this (who wont buy the pro-series cam) do.
The CXR NR system will detail retention at 12800 similar to 3200 on current model, though a 1 2/3 stop improvement is the conservative, stated estimate. Canon hopes to create a "wow" factor with a conservative estimate that surpasses itself in studio/ pro review tests, because they know at this level, you'll be looking there. The philosophy here is that it will create such a "buzz," many who would not consider this camera will consider it. Calling a 2-stop advantage a 2-stop advantage would simply be meeting expectations. FPS will also slightly exceed 6 (and 3), as stated. Canon received negative feedback for the 6.5 FPS quoted in the 40D and learned from their mistake here. (Expect Nikon to underpromise at D3 and above cameras in the future. This is common when technology advancements under perform "consumer pull")
The weather sealing will, in fact, be the same as the current flagship. This is in direct response to Nikon and Pentax. Expect full weather sealing to be a feature in all but low-end (Rebel) bodies in the next cycle. You can thank Pentax for this.
Battery life will only be improved by just under 10% due to the extra processing required.
The market segment is not in direct competition with the D300. Just as the 5D created a new class of camera 3 years ago, the new 5D will create a similar new niche above the D300, but below the current Canon flagship. It will remain the affordable, full-frame niche that Nikon chose not to produce. The new Canon flagship, this Fall, will have a "1.5:1 price/performance advantage to the Nikon flagship." (Read carefully: this statement refers to the coming Canon flagship, not the 5D II being discussed here).
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稍微简介一下：
15.3M像素，防水防尘等同于1Ds MarkIII，双核 Digic III，新CXR降噪方法，14 bit A/D，标准ISO到12800（可提到ISO 25600），感光度提高了1 2/3档，全新29点对焦（包括12点f2.8十字对焦点，比40D快35%），可自带多达14个镜头的微调参数，30万次快门，6fps/3fps 快慢速连拍到68张，3" LCD 取景 （922,000像素），防尘系统，LCD取景时的自动对焦系统比450D还好（当然更好于40D），6月2日上市，标价 $3500刀
还有，佳能这次学乖了，故意把性能标低了，主要是为了在大家的测评中得到“超出预期”的评价。实际ISO 12800时的感光度应该等同于现在5D的ISO 3200（2档光圈的提高），实际连拍速度应该接近现在40D的6.5fps（40D上市后被大家骂连拍只有6.1fps~6.3fps）
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