LCD and Viewfinder
Olympus E-420 has a Fixed Type 2.7" LCD screen with a resolution of 230k dots. At only 2.7", the screen is on the smaller side and 230kdot resolution is lower than most of the recent models in this class.
E-420 has a built-in Optical (pentamirror) viewfinder. The viewfinder has a coverage of 95% and a magnification ratio of 0.46x. 95% coverage means that what you see in your viewfinder while shooting will slightly be different from the actual image.
Max Shutter speed
Olympus E-420 can shoot continuously at max speed of 4 fps
and has max shutter speed of 1/4000 sec
E-420 has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Olympus E-420 features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 3 points to choose from.
Unfortunately Olympus E-420 doesn't have Video recording ability.
Connectivity and Storage
Olympus E-420 has a USB 2.0 (480 Mbit/sec) port to connect your camera to other devices.
Olympus E-420 is powered by a proprietary battery which provides a shooting life of 500 according to CIPA standards.
Considering that the average battery life of DSLR type cameras is 943 shots, Olympus E-420 has a short battery life for its class so we strongly recommend E-420 owners to buy some extra batteries.
Battery Life Comparison in Entry-Level DSLR Cameras
Pentax K-x with its 1900shots is the model with longest battery life among Entry-Level DSLR cameras. Check the comparison of Olympus E-420 vs Pentax K-x or take a look at Longest Battery Life DSLR cameras list.
Olympus E-420 Features Compared to Main Competitors