大致参数如下：
16.1 MP APS-H CMOS sensor 1600万APS-H COMS （ x1.3 Crop）
10fps at up to 121 JPEG burst 每秒10张，最多JPG格式连拍121张
45-point AF system with 39 cross type sensors 45个AF对焦点（39个十字型对焦点）
Full HD (1080p) movies with manual control 全高清1080p手动录像
High ISO up to 102400 102400高感光度
3.0" Clear View II LCD with Live View mode 3.0" 高清LCD+Live View模式
Dual "DIGIC 4" 双4代处理器
EOS Integrated Cleaning System 自动清洗功能
More than a number

剩下的兄弟们自己看吧
16.1 MP CMOS sensor
A Canon designed and manufactured 16.1MP APS-H sized CMOS sensor produces incredibly low noise images in the lowest of light. The sensor captures outstanding detail ideal for A3 prints or larger, even after cropping.

10fps with upto 121 JPEG frame burst
Capture every moment of action with the EOS-1D Mark IV's 10fps shooting speed, and continuous bursts of up to 121 large JPEG images (28 RAW).

45-point AF system
A high-precision 45 point AF system featuring 39 cross type sensors debuts in the EOS-1D Mark IV. Ensuring accurate focusing with fast aperture lenses, 39 high sensitivity cross-type sensors are employed, suitable for lenses with an aperture of f/2.8 or faster.

Full HD movie recording
Combining exceptional still shooting with the ability to shoot Full HD (1080p) video with user selectable frame rates, EOS-1D Mark IV offers huge versatility. For more control users can manually set exposure or choose to shoot at 720p or VGA resolution. An HDMI output allows High Definition playback of footage and images.

Low light shooting
Thanks to the EOS-1D Mark IV's exceptionally wide ISO range of 100 to 12800 - expandable up to an incredible ISO 102400 - shooting need never stop even in the darkest of conditions.

3.0" Clear View II LCD with Live View mode
With its high resolution 920,000 dot 3.0" Clear View II LCD screen, detailed checks on images and video are easy. Using a solid structure construction, reflections are minimised, allowing Live View to be used under any conditions.

Dual "DIGIC 4"
Canon's Dual "DIGIC 4" processors enable high speed processing of the high resolution images from EOS-1D Mark IV's CMOS sensor, delivering 14-bit image processing with smooth gradations and natural looking colours. The Dual "DIGIC 4" provides advanced Noise Reduction when shooting at higher ISO speeds and instant startup times.

EOS Integrated Cleaning System
Canon's built-in dust prevention system offers a professional and comprehensive solution in protecting images against the effects of dust: reduction of internal dust generation; an in-camera sensor cleaning mechanism; automatic removal of dust spots with the included Digital Photo Professional software.

Full EF and EX Speedlite compatibility
Canon's full range of EF lenses and EX-series Speedlites is available to the EOS-1D Mark IV user. Create a system tailor-made to your photographic needs.

这个link信息较全
http://info.xitek.com/newproduct/dsl.../20-29265.html

不错，就是不知上市时的价格？

厂家定价是USD4999。
一般来说，刚上市时，这个价格会被CANON力挺一段时间。不过，佳能历来有年底的促销。

[html]<tbody><tr>
<th>List Price (body only)</th>
<td>•&nbsp;£4499 (UK)<br>
•&nbsp;$4999 (US)<br>
•&nbsp;€ 4599 (EU)</td>

</tr>
<tr>
<th width="132">Body material</th>
<td width="409">Magnesium alloy (exterior, chassis and mirror box) </td>
</tr>
<tr>
<th>Sensor<span class="green"> *</span> </th>

<td>• 27.9 x 18.6 mm CMOS sensor<br>
• 1.3x crop factor<br>
• RGB Color Filter Array<br>
• Built-in fixed low-pass filter (with self-cleaning unit) <br>
• 17 million total pixels<span class="green"></span><br>
• 16.1 million effective pixels <br>

• 3:2 aspect ratio</td>
</tr>
<tr>
<th>Image processor<span class="green"> *</span> </th>
<td>Dual DIGIC 4</td>
</tr>

<tr>
<th>A/D conversion</th>
<td>14 bit </td>
</tr>
<tr>
<th>Image sizes
(JPEG)<span class="green"> *</span> </th>

<td><p>• 4896x3264 (L)<br>
• 4320x2880 (M1)<br>
• 3552x2368 (M2)<br>
• 2448x1632 (S)</p></td>
</tr>
<tr>
<th>Image sizes
(RAW)<span class="green"> *</span> </th>

<td>• 4896x3264 (RAW)<br>
• 3672x2448 (M-RAW)<br>
• 2448x1632 (S-RAW)</td>
</tr>
<tr>
<th>File formats</th>
<td><p>• RAW (.CR2; 14-bit)<br>

• JPEG (EXIF 2.21) - Fine / Normal <br>
• RAW + JPEG (separate files)</p></td>
</tr>
<tr>
<th>JPEG quality options </th>
<td>Each JPEG size (L, M1, M2, S) can be set to a quality level of 1 to 10 (1 high compression, low quality - 10 low compression, high quality) </td>
</tr>

<tr>
<th>Movie Mode</th>
<td>• MOV (Video: H.264, Sound: Linear PCM)<br>
• 1920 x 1080 (29.97, 25, 23.976 fps)<br>
• 1280 x 720 (59.94, 50 fps)<br>
• 640 x 480 (59.94, 50 fps)<br>

• Max duration: 29min 59sec<br>
• Max file size: 4GB<br></td>
</tr>
<tr>
<th>Lenses</th>
<td>• Canon EF lens mount (does not support EF-S lenses)<span class="green"></span><br>
• 1.3x field of view crop<span class="green"></span></td>

</tr>
<tr>
<th>Dust reduction</th>
<td>• "EOS Integrated Cleaning System" with fluorine coating<br>
• Self-cleaning sensor unit (filter in front of sensor vibrates at high frequency at start-up and shutdown - can be disabled)<br>
• Dust Delete Data - Data from a test shot is used to 'map' dust spots and can be later removed using Canon DPP Software </td>
</tr>

<tr>
<th>Auto focus <span class="green">*</span></th>
<td>• 45-point TTL<br>
• 39 cross-type points, require F2.8 or faster lens<span class="green"> *</span> <br>
• TTL-AREA-SIR with a CMOS sensor<br>

• AF working range: -1.0 to 18 EV (at 23°C, ISO 100)</td>
</tr>
<tr>
<th>Focus modes</th>
<td>• One shot AF<br>
• AI Servo AF<br>
• Manual focus</td>

</tr>
<tr>
<th>AF point selection <span class="green">*</span></th>
<td>• Auto<br>
• Manual: Single point AF (45, 19, 11 or 9 points selectable)<br>
• Manual: Spot AF (with compatible lens)<br>

• Manual: AF point Expansion (Left right,surround, all 45)<br>
• AF points can be selected separately for vertical and horizontal shooting</td>
</tr>
<tr>
<th>AF assist</th>
<td>External Speedlite only <span class="green"></span></td>
</tr>

</tbody>[/html]

网站不支持HTML，感兴趣可直接到
http://www.dpreview.com/news/0910/09102001canon1d4.asp

低于3W就可以考虑了！