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-5010 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-5010 has external dimensions of 96 x 57 x 21 mm (3.78 x 2.24 x 0.83″) and weighs 130 g (0.29 lb / 4.59 oz) (including batteries).
Below you can see the front view size comparison of Canon 400D and Olympus FE-5010. Olympus FE-5010 is clearly the smaller of the two cameras. Its body is 31mm narrower, 37mm shorter and 44mm thinner than Canon 400D. As you can tell, actually this is not a fair size comparison since Olympus FE-5010 has a built-in lens but Canon 400D doesn't. Once you put a lens on 400D, its thickness will increase significantly.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus FE-5010 is significantly lighter (426g ) 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-5010, 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-5010'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.