Key features / improvements

* 21 megapixel CMOS sensor (very similar to the sensor in the EOS-1Ds Mark III)
* Sensor dust reduction by vibration of filter
* ISO 100 - 6400 calibrated range, ISO 50 - 25600 expansion (1Ds Mark III & 5D max ISO 3200)
* Auto ISO (100 - 3200) in all modes except manual
* 3.9 frames per second continuous shooting
* DIGIC 4 processor, new menus / interface as per the EOS 50D
* Image processing features:
o Highlight tone priority
o Auto lighting optimizer (4 levels)
o High ISO noise reduction (4 levels)
o Lens peripheral illumination correction (vignetting correction)
* RAW and SRAW1 (10 MP) / SRAW2 (5 MP)
* RAW / JPEG selection made separately
* Permanent display of ISO on both top plate and viewfinder displays
* AF microadjustment (up to 20 lenses individually)
* Three custom modes on command dial, Creative Auto mode
* Image copyright metadata support
* 98% coverage viewfinder (0.71x magnification)
* 3.0" 920,000 dot LCD monitor with 'Clear View' cover / coatings, 170° viewing angle
* Automatic LCD brightness adjustment (ambient light sensor)
* Live view with three mode auto-focus (including face detection)
* No mirror-flip for exposures in Live View if contrast detect AF selected
* Movie recording in live view (1080p H.264 up to 12 minutes, VGA H.264 up to 24 mins per clip)
* Two mode silent shooting (in live view)
* New jump options in play mode
* HDMI and standard composite (AV) video out
* Full audio support: built-in mic and speaker, mic-in socket, audio-out over AV (although not HDMI)
* IrPort (supports IR remote shutter release using optional RC1 / RC5 controllers)
* UDMA CompactFlash support
* New 1800 mAh battery with improved battery information / logging
* New optional WFT-E4 WiFi / LAN / USB vertical grip
* Water resistance: 10 mm rain in 3 minutes

This is the famous video shot with the 5D Mark II . Got this from youtube, Can't seem to locate the full HD version.

http://www.youtube.com/watch?v=Zu3bQqCTAIw

Another sample

http://www.youtube.com/watch?v=CdaybWRRDWI

The 5DMK2 has a 21mp file size for the raw format. This is a vital factor when cropping is concerned.

I have taken a photo of the harbour as below without any cropping (& full frame of course).



Here is a cropped section of the above photo (25% of it) Take note of the ship OCL at the background.



Here is a smaller cropped section ( I think maybe only 10%)



The above photo was taken just at sunset under low lighting using a 17-40mm L f4.
Setting: 6s f5 ISO100 on tripod with remote release on mirror lockup. Photo process with Photoshop CS4