Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Canon 400D and Olympus FE-5020 side-by-side from the front, back and top in their relative dimensions. Canon 400D has external dimensions of 127 x 94 x 65 mm (5 x 3.7 x 2.56″) and weighs 556 g (1.23 lb / 19.61 oz) (including batteries). Olympus FE-5020 has external dimensions of 93 x 56 x 25 mm (3.66 x 2.2 x 0.98″) and weighs 137 g (0.30 lb / 4.83 oz) (including batteries).
Below you can see the front view size comparison of Canon 400D and Olympus FE-5020. Olympus FE-5020 is clearly the smaller of the two cameras. Its body is 34mm narrower, 38mm shorter and 40mm thinner than Canon 400D. As you can tell, actually this is not a fair size comparison since Olympus FE-5020 has a built-in lens but Canon 400D doesn't. Once you put a lens on 400D, its thickness will increase significantly.
Now lets look at the top view comparison of Canon 400D and Olympus FE-5020.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus FE-5020 is significantly lighter (419g ) than the Canon 400D which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on 400D, the total kit will weigh much higher.
Thanks to the weather sealed body of FE-5020, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to 400D.
LCD Screen Size and Features
Olympus FE-5020's 2.7" LCD screen is slightly larger than Canon 400D's 2.5" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.