Three years ago, Canon shocked the camera market with the introduction of the 8 Megapixel 
EOS 300D. It was a price breakthrough that would prove very important for the DSLR market. Suddenly, a digital SLR camera had become available for the novice photographer. And things didn’t end there; since this event, digital SLR models have been in high demand. After a year and a half, Canon introduced the EOS 350D, which easily matched the success of its predecessor. It was a pretty safe bet that the successor of the EOS 350D would once again follow a year and a half later. Such was indeed the case. Canon’s latest DSLR camera turns out to be the Canon EOS 400D, a ten Megapixel model. Remarkably, the EOS 350D will remain in stores for now. That doesn’t change the fact, however, that the Canon 400D should be seen as its successor.
Canon EOS 400D - 2.5 inch LCD display
The frequency of the introductions may cause one to think the differences between the EOS types aren’t all that big. Canon’s rival Nikon, for instance, introduce their models at a more leisurely pace; which means the differences between, let’s say, the D70 and the D80 seem considerably more significant. However, if we put the EOS 300D next to the EOS 400D, we note a comparably large difference. The Canon EOS 400D is still a very compact DSLR camera, and upon first glance it certainly does resemble the EOS 350D. The camera’s back side, however, shows a main difference; the Canon 400D is equipped with a noticeably larger monitor, which has increased in size from 1.8-inch to 2.5-inch. Consequently, the small LCD display on top of the camera has disappeared. Canon have solved this issue by displaying the information on the large monitor, which is something we encounter quite frequently with many other competing models. Canon EOS 400D Digital Camera Review