Olympus E420 is a possession of tens of millions of pixels imaging capability, you can use real-time LCD viewfinder of the entry-level digital SLR camera. Other difference is that the SLR, Olympus E420 compact body thin and light form factor, portability is a very good SLR.
  DIGIC 4 processors benefit from the powerful processing power, EOS 5D Mark II to achieve the continuous improvement of quality control and rapid image transmission and processing. The amount of light around the new correction, for some optical structure lens due to the reasons causing the edge of photos of dark corners, to remove photo provided Anjiao. This feature is the use of wide-angle lenses or zoom lenses than the maximum aperture take effect more visible. Will be up to 40 in the camera lens information on registration, open around the amount of light correction feature can automatically correct photos Anjiao. Random use of the software EOS Utility, not to be registered with the Canon lens registration data correction. JPEG images on the camera automatically remove Anjiao; and RAW images through Digital Photo Professional software random "shooting settings" to the operation.

     EOS 5D Mark II can take full high-definition and standard-definition video formats, recording format is MOV, full-resolution high-definition format is 1920 × 1080 pixels (16:9), the SD format of the resolution is 640 × 480 Pixels (VGA, 4:3), the two formats are the frame rate 30fps. The camera has a built-in microphone and can record mono audio signal; at the same time provides a microphone jack, external stereo microphone. 4GB use of the CF card, full high-definition video up to the time taken for about 12 minutes, Standard Definition video for about 24 minutes. The short film shot in the camera directly to the browser, the voice through the camera's built-in speaker to play. Through the machine onto the HDMI interface to connect high-definition television, or through video output to connect terminals ordinary SDTV can view video on television. As a digital SLR, the pictures were taken priority remains the basic principles of design. As a result, in the short film, once the need to take a picture, press the shutter button to complete.
EOS 5D Mark II auto-focusing system for high-performance 9:00 wide area AF, in addition to the focus on the auto-9, and 6 of the auxiliary focus on the central focus of the use of cross-focus sensor, and f/2.8 Light-sensitive, in the middle of the two auxiliary also focus on the sensitive f/2.8, f/5.6 sensitive to the rest of the points to ensure that the use of large aperture lens when AF accuracy and speed. 5D Mark II optical viewfinder with a wide field of vision and precise characteristics of the viewfinder, it Perspective coverage of about 98% magnification is about 0.71 times the angle of about 33.3 degrees, the focus of 21mm. In addition to the random configuration of the standard focusing screen, you can purchase for the construction of the photographic grid, or focusing screen for manual focusing of ultra-fine precision matte focusing screen. Viewfinder observed, the new ISO sensitivity, high-priority light color, black and white film and battery information.

     EOS 5D Mark II used a reliable and durable shutter unit, the service life of about 150,000 times, the camera's start-up time is 0.1 seconds, shutter lag of only 73 milliseconds to a maximum shutter speed of 1 / 8000 second, flash sync speed of 1 / 200 seconds. EOS 5D Mark II's EOS integrated dust removal system, by inhibiting the production and accumulation of dust, dust to clear and effective protection of multiple, to avoid dust on the image quality. The new image sensor in the low-pass filter out the most, an increase of a fluorine coating, dust attached to the above is difficult to improve the efficiency of dust removal system. EOS 5D Mark II used the body of magnesium alloy materials, lightweight and strong, with excellent electromagnetic shielding performance. The camera has a dust-proof performance drops of water, covered by the battery positions, CF card slot cover, and at the top of the fuselage on the back of the switches, buttons are closed to deal with, the outside world can be an effective bulwark against the invasion of dust and rain.